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   1  /*!
   2   * jQuery UI Datepicker 1.9.2
   3   * http://jqueryui.com
   4   *
   5   * Copyright 2012 jQuery Foundation and other contributors
   6   * Released under the MIT license.
   7   * http://jquery.org/license
   8   *
   9   * http://api.jqueryui.com/datepicker/
  10   *
  11   * Depends:
  12   *    jquery.ui.core.js
  13   */
  14  (function( $, undefined ) {
  15  
  16  $.extend($.ui, { datepicker: { version: "1.9.2" } });
  17  
  18  var PROP_NAME = 'datepicker';
  19  var dpuuid = new Date().getTime();
  20  var instActive;
  21  
  22  /* Date picker manager.
  23     Use the singleton instance of this class, $.datepicker, to interact with the date picker.
  24     Settings for (groups of) date pickers are maintained in an instance object,
  25     allowing multiple different settings on the same page. */
  26  
  27  function Datepicker() {
  28      this.debug = false; // Change this to true to start debugging
  29      this._curInst = null; // The current instance in use
  30      this._keyEvent = false; // If the last event was a key event
  31      this._disabledInputs = []; // List of date picker inputs that have been disabled
  32      this._datepickerShowing = false; // True if the popup picker is showing , false if not
  33      this._inDialog = false; // True if showing within a "dialog", false if not
  34      this._mainDivId = 'ui-datepicker-div'; // The ID of the main datepicker division
  35      this._inlineClass = 'ui-datepicker-inline'; // The name of the inline marker class
  36      this._appendClass = 'ui-datepicker-append'; // The name of the append marker class
  37      this._triggerClass = 'ui-datepicker-trigger'; // The name of the trigger marker class
  38      this._dialogClass = 'ui-datepicker-dialog'; // The name of the dialog marker class
  39      this._disableClass = 'ui-datepicker-disabled'; // The name of the disabled covering marker class
  40      this._unselectableClass = 'ui-datepicker-unselectable'; // The name of the unselectable cell marker class
  41      this._currentClass = 'ui-datepicker-current-day'; // The name of the current day marker class
  42      this._dayOverClass = 'ui-datepicker-days-cell-over'; // The name of the day hover marker class
  43      this.regional = []; // Available regional settings, indexed by language code
  44      this.regional[''] = { // Default regional settings
  45          closeText: 'Done', // Display text for close link
  46          prevText: 'Prev', // Display text for previous month link
  47          nextText: 'Next', // Display text for next month link
  48          currentText: 'Today', // Display text for current month link
  49          monthNames: ['January','February','March','April','May','June',
  50              'July','August','September','October','November','December'], // Names of months for drop-down and formatting
  51          monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'], // For formatting
  52          dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'], // For formatting
  53          dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'], // For formatting
  54          dayNamesMin: ['Su','Mo','Tu','We','Th','Fr','Sa'], // Column headings for days starting at Sunday
  55          weekHeader: 'Wk', // Column header for week of the year
  56          dateFormat: 'mm/dd/yy', // See format options on parseDate
  57          firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
  58          isRTL: false, // True if right-to-left language, false if left-to-right
  59          showMonthAfterYear: false, // True if the year select precedes month, false for month then year
  60          yearSuffix: '' // Additional text to append to the year in the month headers
  61      };
  62      this._defaults = { // Global defaults for all the date picker instances
  63          showOn: 'focus', // 'focus' for popup on focus,
  64              // 'button' for trigger button, or 'both' for either
  65          showAnim: 'fadeIn', // Name of jQuery animation for popup
  66          showOptions: {}, // Options for enhanced animations
  67          defaultDate: null, // Used when field is blank: actual date,
  68              // +/-number for offset from today, null for today
  69          appendText: '', // Display text following the input box, e.g. showing the format
  70          buttonText: '...', // Text for trigger button
  71          buttonImage: '', // URL for trigger button image
  72          buttonImageOnly: false, // True if the image appears alone, false if it appears on a button
  73          hideIfNoPrevNext: false, // True to hide next/previous month links
  74              // if not applicable, false to just disable them
  75          navigationAsDateFormat: false, // True if date formatting applied to prev/today/next links
  76          gotoCurrent: false, // True if today link goes back to current selection instead
  77          changeMonth: false, // True if month can be selected directly, false if only prev/next
  78          changeYear: false, // True if year can be selected directly, false if only prev/next
  79          yearRange: 'c-10:c+10', // Range of years to display in drop-down,
  80              // either relative to today's year (-nn:+nn), relative to currently displayed year
  81              // (c-nn:c+nn), absolute (nnnn:nnnn), or a combination of the above (nnnn:-n)
  82          showOtherMonths: false, // True to show dates in other months, false to leave blank
  83          selectOtherMonths: false, // True to allow selection of dates in other months, false for unselectable
  84          showWeek: false, // True to show week of the year, false to not show it
  85          calculateWeek: this.iso8601Week, // How to calculate the week of the year,
  86              // takes a Date and returns the number of the week for it
  87          shortYearCutoff: '+10', // Short year values < this are in the current century,
  88              // > this are in the previous century,
  89              // string value starting with '+' for current year + value
  90          minDate: null, // The earliest selectable date, or null for no limit
  91          maxDate: null, // The latest selectable date, or null for no limit
  92          duration: 'fast', // Duration of display/closure
  93          beforeShowDay: null, // Function that takes a date and returns an array with
  94              // [0] = true if selectable, false if not, [1] = custom CSS class name(s) or '',
  95              // [2] = cell title (optional), e.g. $.datepicker.noWeekends
  96          beforeShow: null, // Function that takes an input field and
  97              // returns a set of custom settings for the date picker
  98          onSelect: null, // Define a callback function when a date is selected
  99          onChangeMonthYear: null, // Define a callback function when the month or year is changed
 100          onClose: null, // Define a callback function when the datepicker is closed
 101          numberOfMonths: 1, // Number of months to show at a time
 102          showCurrentAtPos: 0, // The position in multipe months at which to show the current month (starting at 0)
 103          stepMonths: 1, // Number of months to step back/forward
 104          stepBigMonths: 12, // Number of months to step back/forward for the big links
 105          altField: '', // Selector for an alternate field to store selected dates into
 106          altFormat: '', // The date format to use for the alternate field
 107          constrainInput: true, // The input is constrained by the current date format
 108          showButtonPanel: false, // True to show button panel, false to not show it
 109          autoSize: false, // True to size the input for the date format, false to leave as is
 110          disabled: false // The initial disabled state
 111      };
 112      $.extend(this._defaults, this.regional['']);
 113      this.dpDiv = bindHover($('<div id="' + this._mainDivId + '" class="ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all"></div>'));
 114  }
 115  
 116  $.extend(Datepicker.prototype, {
 117      /* Class name added to elements to indicate already configured with a date picker. */
 118      markerClassName: 'hasDatepicker',
 119  
 120      //Keep track of the maximum number of rows displayed (see #7043)
 121      maxRows: 4,
 122  
 123      /* Debug logging (if enabled). */
 124      log: function () {
 125          if (this.debug)
 126              console.log.apply('', arguments);
 127      },
 128  
 129      // TODO rename to "widget" when switching to widget factory
 130      _widgetDatepicker: function() {
 131          return this.dpDiv;
 132      },
 133  
 134      /* Override the default settings for all instances of the date picker.
 135         @param  settings  object - the new settings to use as defaults (anonymous object)
 136         @return the manager object */
 137      setDefaults: function(settings) {
 138          extendRemove(this._defaults, settings || {});
 139          return this;
 140      },
 141  
 142      /* Attach the date picker to a jQuery selection.
 143         @param  target    element - the target input field or division or span
 144         @param  settings  object - the new settings to use for this date picker instance (anonymous) */
 145      _attachDatepicker: function(target, settings) {
 146          // check for settings on the control itself - in namespace 'date:'
 147          var inlineSettings = null;
 148          for (var attrName in this._defaults) {
 149              var attrValue = target.getAttribute('date:' + attrName);
 150              if (attrValue) {
 151                  inlineSettings = inlineSettings || {};
 152                  try {
 153                      inlineSettings[attrName] = eval(attrValue);
 154                  } catch (err) {
 155                      inlineSettings[attrName] = attrValue;
 156                  }
 157              }
 158          }
 159          var nodeName = target.nodeName.toLowerCase();
 160          var inline = (nodeName == 'div' || nodeName == 'span');
 161          if (!target.id) {
 162              this.uuid += 1;
 163              target.id = 'dp' + this.uuid;
 164          }
 165          var inst = this._newInst($(target), inline);
 166          inst.settings = $.extend({}, settings || {}, inlineSettings || {});
 167          if (nodeName == 'input') {
 168              this._connectDatepicker(target, inst);
 169          } else if (inline) {
 170              this._inlineDatepicker(target, inst);
 171          }
 172      },
 173  
 174      /* Create a new instance object. */
 175      _newInst: function(target, inline) {
 176          var id = target[0].id.replace(/([^A-Za-z0-9_-])/g, '\\\\$1'); // escape jQuery meta chars
 177          return {id: id, input: target, // associated target
 178              selectedDay: 0, selectedMonth: 0, selectedYear: 0, // current selection
 179              drawMonth: 0, drawYear: 0, // month being drawn
 180              inline: inline, // is datepicker inline or not
 181              dpDiv: (!inline ? this.dpDiv : // presentation div
 182              bindHover($('<div class="' + this._inlineClass + ' ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all"></div>')))};
 183      },
 184  
 185      /* Attach the date picker to an input field. */
 186      _connectDatepicker: function(target, inst) {
 187          var input = $(target);
 188          inst.append = $([]);
 189          inst.trigger = $([]);
 190          if (input.hasClass(this.markerClassName))
 191              return;
 192          this._attachments(input, inst);
 193          input.addClass(this.markerClassName).keydown(this._doKeyDown).
 194              keypress(this._doKeyPress).keyup(this._doKeyUp).
 195              bind("setData.datepicker", function(event, key, value) {
 196                  inst.settings[key] = value;
 197              }).bind("getData.datepicker", function(event, key) {
 198                  return this._get(inst, key);
 199              });
 200          this._autoSize(inst);
 201          $.data(target, PROP_NAME, inst);
 202          //If disabled option is true, disable the datepicker once it has been attached to the input (see ticket #5665)
 203          if( inst.settings.disabled ) {
 204              this._disableDatepicker( target );
 205          }
 206      },
 207  
 208      /* Make attachments based on settings. */
 209      _attachments: function(input, inst) {
 210          var appendText = this._get(inst, 'appendText');
 211          var isRTL = this._get(inst, 'isRTL');
 212          if (inst.append)
 213              inst.append.remove();
 214          if (appendText) {
 215              inst.append = $('<span class="' + this._appendClass + '">' + appendText + '</span>');
 216              input[isRTL ? 'before' : 'after'](inst.append);
 217          }
 218          input.unbind('focus', this._showDatepicker);
 219          if (inst.trigger)
 220              inst.trigger.remove();
 221          var showOn = this._get(inst, 'showOn');
 222          if (showOn == 'focus' || showOn == 'both') // pop-up date picker when in the marked field
 223              input.focus(this._showDatepicker);
 224          if (showOn == 'button' || showOn == 'both') { // pop-up date picker when button clicked
 225              var buttonText = this._get(inst, 'buttonText');
 226              var buttonImage = this._get(inst, 'buttonImage');
 227              inst.trigger = $(this._get(inst, 'buttonImageOnly') ?
 228                  $('<img/>').addClass(this._triggerClass).
 229                      attr({ src: buttonImage, alt: buttonText, title: buttonText }) :
 230                  $('<button type="button"></button>').addClass(this._triggerClass).
 231                      html(buttonImage == '' ? buttonText : $('<img/>').attr(
 232                      { src:buttonImage, alt:buttonText, title:buttonText })));
 233              input[isRTL ? 'before' : 'after'](inst.trigger);
 234              inst.trigger.click(function() {
 235                  if ($.datepicker._datepickerShowing && $.datepicker._lastInput == input[0])
 236                      $.datepicker._hideDatepicker();
 237                  else if ($.datepicker._datepickerShowing && $.datepicker._lastInput != input[0]) {
 238                      $.datepicker._hideDatepicker();
 239                      $.datepicker._showDatepicker(input[0]);
 240                  } else
 241                      $.datepicker._showDatepicker(input[0]);
 242                  return false;
 243              });
 244          }
 245      },
 246  
 247      /* Apply the maximum length for the date format. */
 248      _autoSize: function(inst) {
 249          if (this._get(inst, 'autoSize') && !inst.inline) {
 250              var date = new Date(2009, 12 - 1, 20); // Ensure double digits
 251              var dateFormat = this._get(inst, 'dateFormat');
 252              if (dateFormat.match(/[DM]/)) {
 253                  var findMax = function(names) {
 254                      var max = 0;
 255                      var maxI = 0;
 256                      for (var i = 0; i < names.length; i++) {
 257                          if (names[i].length > max) {
 258                              max = names[i].length;
 259                              maxI = i;
 260                          }
 261                      }
 262                      return maxI;
 263                  };
 264                  date.setMonth(findMax(this._get(inst, (dateFormat.match(/MM/) ?
 265                      'monthNames' : 'monthNamesShort'))));
 266                  date.setDate(findMax(this._get(inst, (dateFormat.match(/DD/) ?
 267                      'dayNames' : 'dayNamesShort'))) + 20 - date.getDay());
 268              }
 269              inst.input.attr('size', this._formatDate(inst, date).length);
 270          }
 271      },
 272  
 273      /* Attach an inline date picker to a div. */
 274      _inlineDatepicker: function(target, inst) {
 275          var divSpan = $(target);
 276          if (divSpan.hasClass(this.markerClassName))
 277              return;
 278          divSpan.addClass(this.markerClassName).append(inst.dpDiv).
 279              bind("setData.datepicker", function(event, key, value){
 280                  inst.settings[key] = value;
 281              }).bind("getData.datepicker", function(event, key){
 282                  return this._get(inst, key);
 283              });
 284          $.data(target, PROP_NAME, inst);
 285          this._setDate(inst, this._getDefaultDate(inst), true);
 286          this._updateDatepicker(inst);
 287          this._updateAlternate(inst);
 288          //If disabled option is true, disable the datepicker before showing it (see ticket #5665)
 289          if( inst.settings.disabled ) {
 290              this._disableDatepicker( target );
 291          }
 292          // Set display:block in place of inst.dpDiv.show() which won't work on disconnected elements
 293          // http://bugs.jqueryui.com/ticket/7552 - A Datepicker created on a detached div has zero height
 294          inst.dpDiv.css( "display", "block" );
 295      },
 296  
 297      /* Pop-up the date picker in a "dialog" box.
 298         @param  input     element - ignored
 299         @param  date      string or Date - the initial date to display
 300         @param  onSelect  function - the function to call when a date is selected
 301         @param  settings  object - update the dialog date picker instance's settings (anonymous object)
 302         @param  pos       int[2] - coordinates for the dialog's position within the screen or
 303                           event - with x/y coordinates or
 304                           leave empty for default (screen centre)
 305         @return the manager object */
 306      _dialogDatepicker: function(input, date, onSelect, settings, pos) {
 307          var inst = this._dialogInst; // internal instance
 308          if (!inst) {
 309              this.uuid += 1;
 310              var id = 'dp' + this.uuid;
 311              this._dialogInput = $('<input type="text" id="' + id +
 312                  '" style="position: absolute; top: -100px; width: 0px;"/>');
 313              this._dialogInput.keydown(this._doKeyDown);
 314              $('body').append(this._dialogInput);
 315              inst = this._dialogInst = this._newInst(this._dialogInput, false);
 316              inst.settings = {};
 317              $.data(this._dialogInput[0], PROP_NAME, inst);
 318          }
 319          extendRemove(inst.settings, settings || {});
 320          date = (date && date.constructor == Date ? this._formatDate(inst, date) : date);
 321          this._dialogInput.val(date);
 322  
 323          this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);
 324          if (!this._pos) {
 325              var browserWidth = document.documentElement.clientWidth;
 326              var browserHeight = document.documentElement.clientHeight;
 327              var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
 328              var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
 329              this._pos = // should use actual width/height below
 330                  [(browserWidth / 2) - 100 + scrollX, (browserHeight / 2) - 150 + scrollY];
 331          }
 332  
 333          // move input on screen for focus, but hidden behind dialog
 334          this._dialogInput.css('left', (this._pos[0] + 20) + 'px').css('top', this._pos[1] + 'px');
 335          inst.settings.onSelect = onSelect;
 336          this._inDialog = true;
 337          this.dpDiv.addClass(this._dialogClass);
 338          this._showDatepicker(this._dialogInput[0]);
 339          if ($.blockUI)
 340              $.blockUI(this.dpDiv);
 341          $.data(this._dialogInput[0], PROP_NAME, inst);
 342          return this;
 343      },
 344  
 345      /* Detach a datepicker from its control.
 346         @param  target    element - the target input field or division or span */
 347      _destroyDatepicker: function(target) {
 348          var $target = $(target);
 349          var inst = $.data(target, PROP_NAME);
 350          if (!$target.hasClass(this.markerClassName)) {
 351              return;
 352          }
 353          var nodeName = target.nodeName.toLowerCase();
 354          $.removeData(target, PROP_NAME);
 355          if (nodeName == 'input') {
 356              inst.append.remove();
 357              inst.trigger.remove();
 358              $target.removeClass(this.markerClassName).
 359                  unbind('focus', this._showDatepicker).
 360                  unbind('keydown', this._doKeyDown).
 361                  unbind('keypress', this._doKeyPress).
 362                  unbind('keyup', this._doKeyUp);
 363          } else if (nodeName == 'div' || nodeName == 'span')
 364              $target.removeClass(this.markerClassName).empty();
 365      },
 366  
 367      /* Enable the date picker to a jQuery selection.
 368         @param  target    element - the target input field or division or span */
 369      _enableDatepicker: function(target) {
 370          var $target = $(target);
 371          var inst = $.data(target, PROP_NAME);
 372          if (!$target.hasClass(this.markerClassName)) {
 373              return;
 374          }
 375          var nodeName = target.nodeName.toLowerCase();
 376          if (nodeName == 'input') {
 377              target.disabled = false;
 378              inst.trigger.filter('button').
 379                  each(function() { this.disabled = false; }).end().
 380                  filter('img').css({opacity: '1.0', cursor: ''});
 381          }
 382          else if (nodeName == 'div' || nodeName == 'span') {
 383              var inline = $target.children('.' + this._inlineClass);
 384              inline.children().removeClass('ui-state-disabled');
 385              inline.find("select.ui-datepicker-month, select.ui-datepicker-year").
 386                  prop("disabled", false);
 387          }
 388          this._disabledInputs = $.map(this._disabledInputs,
 389              function(value) { return (value == target ? null : value); }); // delete entry
 390      },
 391  
 392      /* Disable the date picker to a jQuery selection.
 393         @param  target    element - the target input field or division or span */
 394      _disableDatepicker: function(target) {
 395          var $target = $(target);
 396          var inst = $.data(target, PROP_NAME);
 397          if (!$target.hasClass(this.markerClassName)) {
 398              return;
 399          }
 400          var nodeName = target.nodeName.toLowerCase();
 401          if (nodeName == 'input') {
 402              target.disabled = true;
 403              inst.trigger.filter('button').
 404                  each(function() { this.disabled = true; }).end().
 405                  filter('img').css({opacity: '0.5', cursor: 'default'});
 406          }
 407          else if (nodeName == 'div' || nodeName == 'span') {
 408              var inline = $target.children('.' + this._inlineClass);
 409              inline.children().addClass('ui-state-disabled');
 410              inline.find("select.ui-datepicker-month, select.ui-datepicker-year").
 411                  prop("disabled", true);
 412          }
 413          this._disabledInputs = $.map(this._disabledInputs,
 414              function(value) { return (value == target ? null : value); }); // delete entry
 415          this._disabledInputs[this._disabledInputs.length] = target;
 416      },
 417  
 418      /* Is the first field in a jQuery collection disabled as a datepicker?
 419         @param  target    element - the target input field or division or span
 420         @return boolean - true if disabled, false if enabled */
 421      _isDisabledDatepicker: function(target) {
 422          if (!target) {
 423              return false;
 424          }
 425          for (var i = 0; i < this._disabledInputs.length; i++) {
 426              if (this._disabledInputs[i] == target)
 427                  return true;
 428          }
 429          return false;
 430      },
 431  
 432      /* Retrieve the instance data for the target control.
 433         @param  target  element - the target input field or division or span
 434         @return  object - the associated instance data
 435         @throws  error if a jQuery problem getting data */
 436      _getInst: function(target) {
 437          try {
 438              return $.data(target, PROP_NAME);
 439          }
 440          catch (err) {
 441              throw 'Missing instance data for this datepicker';
 442          }
 443      },
 444  
 445      /* Update or retrieve the settings for a date picker attached to an input field or division.
 446         @param  target  element - the target input field or division or span
 447         @param  name    object - the new settings to update or
 448                         string - the name of the setting to change or retrieve,
 449                         when retrieving also 'all' for all instance settings or
 450                         'defaults' for all global defaults
 451         @param  value   any - the new value for the setting
 452                         (omit if above is an object or to retrieve a value) */
 453      _optionDatepicker: function(target, name, value) {
 454          var inst = this._getInst(target);
 455          if (arguments.length == 2 && typeof name == 'string') {
 456              return (name == 'defaults' ? $.extend({}, $.datepicker._defaults) :
 457                  (inst ? (name == 'all' ? $.extend({}, inst.settings) :
 458                  this._get(inst, name)) : null));
 459          }
 460          var settings = name || {};
 461          if (typeof name == 'string') {
 462              settings = {};
 463              settings[name] = value;
 464          }
 465          if (inst) {
 466              if (this._curInst == inst) {
 467                  this._hideDatepicker();
 468              }
 469              var date = this._getDateDatepicker(target, true);
 470              var minDate = this._getMinMaxDate(inst, 'min');
 471              var maxDate = this._getMinMaxDate(inst, 'max');
 472              extendRemove(inst.settings, settings);
 473              // reformat the old minDate/maxDate values if dateFormat changes and a new minDate/maxDate isn't provided
 474              if (minDate !== null && settings['dateFormat'] !== undefined && settings['minDate'] === undefined)
 475                  inst.settings.minDate = this._formatDate(inst, minDate);
 476              if (maxDate !== null && settings['dateFormat'] !== undefined && settings['maxDate'] === undefined)
 477                  inst.settings.maxDate = this._formatDate(inst, maxDate);
 478              this._attachments($(target), inst);
 479              this._autoSize(inst);
 480              this._setDate(inst, date);
 481              this._updateAlternate(inst);
 482              this._updateDatepicker(inst);
 483          }
 484      },
 485  
 486      // change method deprecated
 487      _changeDatepicker: function(target, name, value) {
 488          this._optionDatepicker(target, name, value);
 489      },
 490  
 491      /* Redraw the date picker attached to an input field or division.
 492         @param  target  element - the target input field or division or span */
 493      _refreshDatepicker: function(target) {
 494          var inst = this._getInst(target);
 495          if (inst) {
 496              this._updateDatepicker(inst);
 497          }
 498      },
 499  
 500      /* Set the dates for a jQuery selection.
 501         @param  target   element - the target input field or division or span
 502         @param  date     Date - the new date */
 503      _setDateDatepicker: function(target, date) {
 504          var inst = this._getInst(target);
 505          if (inst) {
 506              this._setDate(inst, date);
 507              this._updateDatepicker(inst);
 508              this._updateAlternate(inst);
 509          }
 510      },
 511  
 512      /* Get the date(s) for the first entry in a jQuery selection.
 513         @param  target     element - the target input field or division or span
 514         @param  noDefault  boolean - true if no default date is to be used
 515         @return Date - the current date */
 516      _getDateDatepicker: function(target, noDefault) {
 517          var inst = this._getInst(target);
 518          if (inst && !inst.inline)
 519              this._setDateFromField(inst, noDefault);
 520          return (inst ? this._getDate(inst) : null);
 521      },
 522  
 523      /* Handle keystrokes. */
 524      _doKeyDown: function(event) {
 525          var inst = $.datepicker._getInst(event.target);
 526          var handled = true;
 527          var isRTL = inst.dpDiv.is('.ui-datepicker-rtl');
 528          inst._keyEvent = true;
 529          if ($.datepicker._datepickerShowing)
 530              switch (event.keyCode) {
 531                  case 9: $.datepicker._hideDatepicker();
 532                          handled = false;
 533                          break; // hide on tab out
 534                  case 13: var sel = $('td.' + $.datepicker._dayOverClass + ':not(.' +
 535                                      $.datepicker._currentClass + ')', inst.dpDiv);
 536                          if (sel[0])
 537                              $.datepicker._selectDay(event.target, inst.selectedMonth, inst.selectedYear, sel[0]);
 538                              var onSelect = $.datepicker._get(inst, 'onSelect');
 539                              if (onSelect) {
 540                                  var dateStr = $.datepicker._formatDate(inst);
 541  
 542                                  // trigger custom callback
 543                                  onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);
 544                              }
 545                          else
 546                              $.datepicker._hideDatepicker();
 547                          return false; // don't submit the form
 548                          break; // select the value on enter
 549                  case 27: $.datepicker._hideDatepicker();
 550                          break; // hide on escape
 551                  case 33: $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 552                              -$.datepicker._get(inst, 'stepBigMonths') :
 553                              -$.datepicker._get(inst, 'stepMonths')), 'M');
 554                          break; // previous month/year on page up/+ ctrl
 555                  case 34: $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 556                              +$.datepicker._get(inst, 'stepBigMonths') :
 557                              +$.datepicker._get(inst, 'stepMonths')), 'M');
 558                          break; // next month/year on page down/+ ctrl
 559                  case 35: if (event.ctrlKey || event.metaKey) $.datepicker._clearDate(event.target);
 560                          handled = event.ctrlKey || event.metaKey;
 561                          break; // clear on ctrl or command +end
 562                  case 36: if (event.ctrlKey || event.metaKey) $.datepicker._gotoToday(event.target);
 563                          handled = event.ctrlKey || event.metaKey;
 564                          break; // current on ctrl or command +home
 565                  case 37: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, (isRTL ? +1 : -1), 'D');
 566                          handled = event.ctrlKey || event.metaKey;
 567                          // -1 day on ctrl or command +left
 568                          if (event.originalEvent.altKey) $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 569                                      -$.datepicker._get(inst, 'stepBigMonths') :
 570                                      -$.datepicker._get(inst, 'stepMonths')), 'M');
 571                          // next month/year on alt +left on Mac
 572                          break;
 573                  case 38: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, -7, 'D');
 574                          handled = event.ctrlKey || event.metaKey;
 575                          break; // -1 week on ctrl or command +up
 576                  case 39: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, (isRTL ? -1 : +1), 'D');
 577                          handled = event.ctrlKey || event.metaKey;
 578                          // +1 day on ctrl or command +right
 579                          if (event.originalEvent.altKey) $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 580                                      +$.datepicker._get(inst, 'stepBigMonths') :
 581                                      +$.datepicker._get(inst, 'stepMonths')), 'M');
 582                          // next month/year on alt +right
 583                          break;
 584                  case 40: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, +7, 'D');
 585                          handled = event.ctrlKey || event.metaKey;
 586                          break; // +1 week on ctrl or command +down
 587                  default: handled = false;
 588              }
 589          else if (event.keyCode == 36 && event.ctrlKey) // display the date picker on ctrl+home
 590              $.datepicker._showDatepicker(this);
 591          else {
 592              handled = false;
 593          }
 594          if (handled) {
 595              event.preventDefault();
 596              event.stopPropagation();
 597          }
 598      },
 599  
 600      /* Filter entered characters - based on date format. */
 601      _doKeyPress: function(event) {
 602          var inst = $.datepicker._getInst(event.target);
 603          if ($.datepicker._get(inst, 'constrainInput')) {
 604              var chars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));
 605              var chr = String.fromCharCode(event.charCode == undefined ? event.keyCode : event.charCode);
 606              return event.ctrlKey || event.metaKey || (chr < ' ' || !chars || chars.indexOf(chr) > -1);
 607          }
 608      },
 609  
 610      /* Synchronise manual entry and field/alternate field. */
 611      _doKeyUp: function(event) {
 612          var inst = $.datepicker._getInst(event.target);
 613          if (inst.input.val() != inst.lastVal) {
 614              try {
 615                  var date = $.datepicker.parseDate($.datepicker._get(inst, 'dateFormat'),
 616                      (inst.input ? inst.input.val() : null),
 617                      $.datepicker._getFormatConfig(inst));
 618                  if (date) { // only if valid
 619                      $.datepicker._setDateFromField(inst);
 620                      $.datepicker._updateAlternate(inst);
 621                      $.datepicker._updateDatepicker(inst);
 622                  }
 623              }
 624              catch (err) {
 625                  $.datepicker.log(err);
 626              }
 627          }
 628          return true;
 629      },
 630  
 631      /* Pop-up the date picker for a given input field.
 632         If false returned from beforeShow event handler do not show.
 633         @param  input  element - the input field attached to the date picker or
 634                        event - if triggered by focus */
 635      _showDatepicker: function(input) {
 636          input = input.target || input;
 637          if (input.nodeName.toLowerCase() != 'input') // find from button/image trigger
 638              input = $('input', input.parentNode)[0];
 639          if ($.datepicker._isDisabledDatepicker(input) || $.datepicker._lastInput == input) // already here
 640              return;
 641          var inst = $.datepicker._getInst(input);
 642          if ($.datepicker._curInst && $.datepicker._curInst != inst) {
 643              $.datepicker._curInst.dpDiv.stop(true, true);
 644              if ( inst && $.datepicker._datepickerShowing ) {
 645                  $.datepicker._hideDatepicker( $.datepicker._curInst.input[0] );
 646              }
 647          }
 648          var beforeShow = $.datepicker._get(inst, 'beforeShow');
 649          var beforeShowSettings = beforeShow ? beforeShow.apply(input, [input, inst]) : {};
 650          if(beforeShowSettings === false){
 651              //false
 652              return;
 653          }
 654          extendRemove(inst.settings, beforeShowSettings);
 655          inst.lastVal = null;
 656          $.datepicker._lastInput = input;
 657          $.datepicker._setDateFromField(inst);
 658          if ($.datepicker._inDialog) // hide cursor
 659              input.value = '';
 660          if (!$.datepicker._pos) { // position below input
 661              $.datepicker._pos = $.datepicker._findPos(input);
 662              $.datepicker._pos[1] += input.offsetHeight; // add the height
 663          }
 664          var isFixed = false;
 665          $(input).parents().each(function() {
 666              isFixed |= $(this).css('position') == 'fixed';
 667              return !isFixed;
 668          });
 669          var offset = {left: $.datepicker._pos[0], top: $.datepicker._pos[1]};
 670          $.datepicker._pos = null;
 671          //to avoid flashes on Firefox
 672          inst.dpDiv.empty();
 673          // determine sizing offscreen
 674          inst.dpDiv.css({position: 'absolute', display: 'block', top: '-1000px'});
 675          $.datepicker._updateDatepicker(inst);
 676          // fix width for dynamic number of date pickers
 677          // and adjust position before showing
 678          offset = $.datepicker._checkOffset(inst, offset, isFixed);
 679          inst.dpDiv.css({position: ($.datepicker._inDialog && $.blockUI ?
 680              'static' : (isFixed ? 'fixed' : 'absolute')), display: 'none',
 681              left: offset.left + 'px', top: offset.top + 'px'});
 682          if (!inst.inline) {
 683              var showAnim = $.datepicker._get(inst, 'showAnim');
 684              var duration = $.datepicker._get(inst, 'duration');
 685              var postProcess = function() {
 686                  var cover = inst.dpDiv.find('iframe.ui-datepicker-cover'); // IE6- only
 687                  if( !! cover.length ){
 688                      var borders = $.datepicker._getBorders(inst.dpDiv);
 689                      cover.css({left: -borders[0], top: -borders[1],
 690                          width: inst.dpDiv.outerWidth(), height: inst.dpDiv.outerHeight()});
 691                  }
 692              };
 693              inst.dpDiv.zIndex($(input).zIndex()+1);
 694              $.datepicker._datepickerShowing = true;
 695  
 696              // DEPRECATED: after BC for 1.8.x $.effects[ showAnim ] is not needed
 697              if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) )
 698                  inst.dpDiv.show(showAnim, $.datepicker._get(inst, 'showOptions'), duration, postProcess);
 699              else
 700                  inst.dpDiv[showAnim || 'show']((showAnim ? duration : null), postProcess);
 701              if (!showAnim || !duration)
 702                  postProcess();
 703              if (inst.input.is(':visible') && !inst.input.is(':disabled'))
 704                  inst.input.focus();
 705              $.datepicker._curInst = inst;
 706          }
 707      },
 708  
 709      /* Generate the date picker content. */
 710      _updateDatepicker: function(inst) {
 711          this.maxRows = 4; //Reset the max number of rows being displayed (see #7043)
 712          var borders = $.datepicker._getBorders(inst.dpDiv);
 713          instActive = inst; // for delegate hover events
 714          inst.dpDiv.empty().append(this._generateHTML(inst));
 715          this._attachHandlers(inst);
 716          var cover = inst.dpDiv.find('iframe.ui-datepicker-cover'); // IE6- only
 717          if( !!cover.length ){ //avoid call to outerXXXX() when not in IE6
 718              cover.css({left: -borders[0], top: -borders[1], width: inst.dpDiv.outerWidth(), height: inst.dpDiv.outerHeight()})
 719          }
 720          inst.dpDiv.find('.' + this._dayOverClass + ' a').mouseover();
 721          var numMonths = this._getNumberOfMonths(inst);
 722          var cols = numMonths[1];
 723          var width = 17;
 724          inst.dpDiv.removeClass('ui-datepicker-multi-2 ui-datepicker-multi-3 ui-datepicker-multi-4').width('');
 725          if (cols > 1)
 726              inst.dpDiv.addClass('ui-datepicker-multi-' + cols).css('width', (width * cols) + 'em');
 727          inst.dpDiv[(numMonths[0] != 1 || numMonths[1] != 1 ? 'add' : 'remove') +
 728              'Class']('ui-datepicker-multi');
 729          inst.dpDiv[(this._get(inst, 'isRTL') ? 'add' : 'remove') +
 730              'Class']('ui-datepicker-rtl');
 731          if (inst == $.datepicker._curInst && $.datepicker._datepickerShowing && inst.input &&
 732                  // #6694 - don't focus the input if it's already focused
 733                  // this breaks the change event in IE
 734                  inst.input.is(':visible') && !inst.input.is(':disabled') && inst.input[0] != document.activeElement)
 735              inst.input.focus();
 736          // deffered render of the years select (to avoid flashes on Firefox)
 737          if( inst.yearshtml ){
 738              var origyearshtml = inst.yearshtml;
 739              setTimeout(function(){
 740                  //assure that inst.yearshtml didn't change.
 741                  if( origyearshtml === inst.yearshtml && inst.yearshtml ){
 742                      inst.dpDiv.find('select.ui-datepicker-year:first').replaceWith(inst.yearshtml);
 743                  }
 744                  origyearshtml = inst.yearshtml = null;
 745              }, 0);
 746          }
 747      },
 748  
 749      /* Retrieve the size of left and top borders for an element.
 750         @param  elem  (jQuery object) the element of interest
 751         @return  (number[2]) the left and top borders */
 752      _getBorders: function(elem) {
 753          var convert = function(value) {
 754              return {thin: 1, medium: 2, thick: 3}[value] || value;
 755          };
 756          return [parseFloat(convert(elem.css('border-left-width'))),
 757              parseFloat(convert(elem.css('border-top-width')))];
 758      },
 759  
 760      /* Check positioning to remain on screen. */
 761      _checkOffset: function(inst, offset, isFixed) {
 762          var dpWidth = inst.dpDiv.outerWidth();
 763          var dpHeight = inst.dpDiv.outerHeight();
 764          var inputWidth = inst.input ? inst.input.outerWidth() : 0;
 765          var inputHeight = inst.input ? inst.input.outerHeight() : 0;
 766          var viewWidth = document.documentElement.clientWidth + (isFixed ? 0 : $(document).scrollLeft());
 767          var viewHeight = document.documentElement.clientHeight + (isFixed ? 0 : $(document).scrollTop());
 768  
 769          offset.left -= (this._get(inst, 'isRTL') ? (dpWidth - inputWidth) : 0);
 770          offset.left -= (isFixed && offset.left == inst.input.offset().left) ? $(document).scrollLeft() : 0;
 771          offset.top -= (isFixed && offset.top == (inst.input.offset().top + inputHeight)) ? $(document).scrollTop() : 0;
 772  
 773          // now check if datepicker is showing outside window viewport - move to a better place if so.
 774          offset.left -= Math.min(offset.left, (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ?
 775              Math.abs(offset.left + dpWidth - viewWidth) : 0);
 776          offset.top -= Math.min(offset.top, (offset.top + dpHeight > viewHeight && viewHeight > dpHeight) ?
 777              Math.abs(dpHeight + inputHeight) : 0);
 778  
 779          return offset;
 780      },
 781  
 782      /* Find an object's position on the screen. */
 783      _findPos: function(obj) {
 784          var inst = this._getInst(obj);
 785          var isRTL = this._get(inst, 'isRTL');
 786          while (obj && (obj.type == 'hidden' || obj.nodeType != 1 || $.expr.filters.hidden(obj))) {
 787              obj = obj[isRTL ? 'previousSibling' : 'nextSibling'];
 788          }
 789          var position = $(obj).offset();
 790          return [position.left, position.top];
 791      },
 792  
 793      /* Hide the date picker from view.
 794         @param  input  element - the input field attached to the date picker */
 795      _hideDatepicker: function(input) {
 796          var inst = this._curInst;
 797          if (!inst || (input && inst != $.data(input, PROP_NAME)))
 798              return;
 799          if (this._datepickerShowing) {
 800              var showAnim = this._get(inst, 'showAnim');
 801              var duration = this._get(inst, 'duration');
 802              var postProcess = function() {
 803                  $.datepicker._tidyDialog(inst);
 804              };
 805  
 806              // DEPRECATED: after BC for 1.8.x $.effects[ showAnim ] is not needed
 807              if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) )
 808                  inst.dpDiv.hide(showAnim, $.datepicker._get(inst, 'showOptions'), duration, postProcess);
 809              else
 810                  inst.dpDiv[(showAnim == 'slideDown' ? 'slideUp' :
 811                      (showAnim == 'fadeIn' ? 'fadeOut' : 'hide'))]((showAnim ? duration : null), postProcess);
 812              if (!showAnim)
 813                  postProcess();
 814              this._datepickerShowing = false;
 815              var onClose = this._get(inst, 'onClose');
 816              if (onClose)
 817                  onClose.apply((inst.input ? inst.input[0] : null),
 818                      [(inst.input ? inst.input.val() : ''), inst]);
 819              this._lastInput = null;
 820              if (this._inDialog) {
 821                  this._dialogInput.css({ position: 'absolute', left: '0', top: '-100px' });
 822                  if ($.blockUI) {
 823                      $.unblockUI();
 824                      $('body').append(this.dpDiv);
 825                  }
 826              }
 827              this._inDialog = false;
 828          }
 829      },
 830  
 831      /* Tidy up after a dialog display. */
 832      _tidyDialog: function(inst) {
 833          inst.dpDiv.removeClass(this._dialogClass).unbind('.ui-datepicker-calendar');
 834      },
 835  
 836      /* Close date picker if clicked elsewhere. */
 837      _checkExternalClick: function(event) {
 838          if (!$.datepicker._curInst)
 839              return;
 840  
 841          var $target = $(event.target),
 842              inst = $.datepicker._getInst($target[0]);
 843  
 844          if ( ( ( $target[0].id != $.datepicker._mainDivId &&
 845                  $target.parents('#' + $.datepicker._mainDivId).length == 0 &&
 846                  !$target.hasClass($.datepicker.markerClassName) &&
 847                  !$target.closest("." + $.datepicker._triggerClass).length &&
 848                  $.datepicker._datepickerShowing && !($.datepicker._inDialog && $.blockUI) ) ) ||
 849              ( $target.hasClass($.datepicker.markerClassName) && $.datepicker._curInst != inst ) )
 850              $.datepicker._hideDatepicker();
 851      },
 852  
 853      /* Adjust one of the date sub-fields. */
 854      _adjustDate: function(id, offset, period) {
 855          var target = $(id);
 856          var inst = this._getInst(target[0]);
 857          if (this._isDisabledDatepicker(target[0])) {
 858              return;
 859          }
 860          this._adjustInstDate(inst, offset +
 861              (period == 'M' ? this._get(inst, 'showCurrentAtPos') : 0), // undo positioning
 862              period);
 863          this._updateDatepicker(inst);
 864      },
 865  
 866      /* Action for current link. */
 867      _gotoToday: function(id) {
 868          var target = $(id);
 869          var inst = this._getInst(target[0]);
 870          if (this._get(inst, 'gotoCurrent') && inst.currentDay) {
 871              inst.selectedDay = inst.currentDay;
 872              inst.drawMonth = inst.selectedMonth = inst.currentMonth;
 873              inst.drawYear = inst.selectedYear = inst.currentYear;
 874          }
 875          else {
 876              var date = new Date();
 877              inst.selectedDay = date.getDate();
 878              inst.drawMonth = inst.selectedMonth = date.getMonth();
 879              inst.drawYear = inst.selectedYear = date.getFullYear();
 880          }
 881          this._notifyChange(inst);
 882          this._adjustDate(target);
 883      },
 884  
 885      /* Action for selecting a new month/year. */
 886      _selectMonthYear: function(id, select, period) {
 887          var target = $(id);
 888          var inst = this._getInst(target[0]);
 889          inst['selected' + (period == 'M' ? 'Month' : 'Year')] =
 890          inst['draw' + (period == 'M' ? 'Month' : 'Year')] =
 891              parseInt(select.options[select.selectedIndex].value,10);
 892          this._notifyChange(inst);
 893          this._adjustDate(target);
 894      },
 895  
 896      /* Action for selecting a day. */
 897      _selectDay: function(id, month, year, td) {
 898          var target = $(id);
 899          if ($(td).hasClass(this._unselectableClass) || this._isDisabledDatepicker(target[0])) {
 900              return;
 901          }
 902          var inst = this._getInst(target[0]);
 903          inst.selectedDay = inst.currentDay = $('a', td).html();
 904          inst.selectedMonth = inst.currentMonth = month;
 905          inst.selectedYear = inst.currentYear = year;
 906          this._selectDate(id, this._formatDate(inst,
 907              inst.currentDay, inst.currentMonth, inst.currentYear));
 908      },
 909  
 910      /* Erase the input field and hide the date picker. */
 911      _clearDate: function(id) {
 912          var target = $(id);
 913          var inst = this._getInst(target[0]);
 914          this._selectDate(target, '');
 915      },
 916  
 917      /* Update the input field with the selected date. */
 918      _selectDate: function(id, dateStr) {
 919          var target = $(id);
 920          var inst = this._getInst(target[0]);
 921          dateStr = (dateStr != null ? dateStr : this._formatDate(inst));
 922          if (inst.input)
 923              inst.input.val(dateStr);
 924          this._updateAlternate(inst);
 925          var onSelect = this._get(inst, 'onSelect');
 926          if (onSelect)
 927              onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);  // trigger custom callback
 928          else if (inst.input)
 929              inst.input.trigger('change'); // fire the change event
 930          if (inst.inline)
 931              this._updateDatepicker(inst);
 932          else {
 933              this._hideDatepicker();
 934              this._lastInput = inst.input[0];
 935              if (typeof(inst.input[0]) != 'object')
 936                  inst.input.focus(); // restore focus
 937              this._lastInput = null;
 938          }
 939      },
 940  
 941      /* Update any alternate field to synchronise with the main field. */
 942      _updateAlternate: function(inst) {
 943          var altField = this._get(inst, 'altField');
 944          if (altField) { // update alternate field too
 945              var altFormat = this._get(inst, 'altFormat') || this._get(inst, 'dateFormat');
 946              var date = this._getDate(inst);
 947              var dateStr = this.formatDate(altFormat, date, this._getFormatConfig(inst));
 948              $(altField).each(function() { $(this).val(dateStr); });
 949          }
 950      },
 951  
 952      /* Set as beforeShowDay function to prevent selection of weekends.
 953         @param  date  Date - the date to customise
 954         @return [boolean, string] - is this date selectable?, what is its CSS class? */
 955      noWeekends: function(date) {
 956          var day = date.getDay();
 957          return [(day > 0 && day < 6), ''];
 958      },
 959  
 960      /* Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
 961         @param  date  Date - the date to get the week for
 962         @return  number - the number of the week within the year that contains this date */
 963      iso8601Week: function(date) {
 964          var checkDate = new Date(date.getTime());
 965          // Find Thursday of this week starting on Monday
 966          checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
 967          var time = checkDate.getTime();
 968          checkDate.setMonth(0); // Compare with Jan 1
 969          checkDate.setDate(1);
 970          return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
 971      },
 972  
 973      /* Parse a string value into a date object.
 974         See formatDate below for the possible formats.
 975  
 976         @param  format    string - the expected format of the date
 977         @param  value     string - the date in the above format
 978         @param  settings  Object - attributes include:
 979                           shortYearCutoff  number - the cutoff year for determining the century (optional)
 980                           dayNamesShort    string[7] - abbreviated names of the days from Sunday (optional)
 981                           dayNames         string[7] - names of the days from Sunday (optional)
 982                           monthNamesShort  string[12] - abbreviated names of the months (optional)
 983                           monthNames       string[12] - names of the months (optional)
 984         @return  Date - the extracted date value or null if value is blank */
 985      parseDate: function (format, value, settings) {
 986          if (format == null || value == null)
 987              throw 'Invalid arguments';
 988          value = (typeof value == 'object' ? value.toString() : value + '');
 989          if (value == '')
 990              return null;
 991          var shortYearCutoff = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff;
 992          shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
 993                  new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
 994          var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
 995          var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
 996          var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
 997          var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
 998          var year = -1;
 999          var month = -1;
1000          var day = -1;
1001          var doy = -1;
1002          var literal = false;
1003          // Check whether a format character is doubled
1004          var lookAhead = function(match) {
1005              var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
1006              if (matches)
1007                  iFormat++;
1008              return matches;
1009          };
1010          // Extract a number from the string value
1011          var getNumber = function(match) {
1012              var isDoubled = lookAhead(match);
1013              var size = (match == '@' ? 14 : (match == '!' ? 20 :
1014                  (match == 'y' && isDoubled ? 4 : (match == 'o' ? 3 : 2))));
1015              var digits = new RegExp('^\\d{1,' + size + '}');
1016              var num = value.substring(iValue).match(digits);
1017              if (!num)
1018                  throw 'Missing number at position ' + iValue;
1019              iValue += num[0].length;
1020              return parseInt(num[0], 10);
1021          };
1022          // Extract a name from the string value and convert to an index
1023          var getName = function(match, shortNames, longNames) {
1024              var names = $.map(lookAhead(match) ? longNames : shortNames, function (v, k) {
1025                  return [ [k, v] ];
1026              }).sort(function (a, b) {
1027                  return -(a[1].length - b[1].length);
1028              });
1029              var index = -1;
1030              $.each(names, function (i, pair) {
1031                  var name = pair[1];
1032                  if (value.substr(iValue, name.length).toLowerCase() == name.toLowerCase()) {
1033                      index = pair[0];
1034                      iValue += name.length;
1035                      return false;
1036                  }
1037              });
1038              if (index != -1)
1039                  return index + 1;
1040              else
1041                  throw 'Unknown name at position ' + iValue;
1042          };
1043          // Confirm that a literal character matches the string value
1044          var checkLiteral = function() {
1045              if (value.charAt(iValue) != format.charAt(iFormat))
1046                  throw 'Unexpected literal at position ' + iValue;
1047              iValue++;
1048          };
1049          var iValue = 0;
1050          for (var iFormat = 0; iFormat < format.length; iFormat++) {
1051              if (literal)
1052                  if (format.charAt(iFormat) == "'" && !lookAhead("'"))
1053                      literal = false;
1054                  else
1055                      checkLiteral();
1056              else
1057                  switch (format.charAt(iFormat)) {
1058                      case 'd':
1059                          day = getNumber('d');
1060                          break;
1061                      case 'D':
1062                          getName('D', dayNamesShort, dayNames);
1063                          break;
1064                      case 'o':
1065                          doy = getNumber('o');
1066                          break;
1067                      case 'm':
1068                          month = getNumber('m');
1069                          break;
1070                      case 'M':
1071                          month = getName('M', monthNamesShort, monthNames);
1072                          break;
1073                      case 'y':
1074                          year = getNumber('y');
1075                          break;
1076                      case '@':
1077                          var date = new Date(getNumber('@'));
1078                          year = date.getFullYear();
1079                          month = date.getMonth() + 1;
1080                          day = date.getDate();
1081                          break;
1082                      case '!':
1083                          var date = new Date((getNumber('!') - this._ticksTo1970) / 10000);
1084                          year = date.getFullYear();
1085                          month = date.getMonth() + 1;
1086                          day = date.getDate();
1087                          break;
1088                      case "'":
1089                          if (lookAhead("'"))
1090                              checkLiteral();
1091                          else
1092                              literal = true;
1093                          break;
1094                      default:
1095                          checkLiteral();
1096                  }
1097          }
1098          if (iValue < value.length){
1099              var extra = value.substr(iValue);
1100              if (!/^\s+/.test(extra)) {
1101                  throw "Extra/unparsed characters found in date: " + extra;
1102              }
1103          }
1104          if (year == -1)
1105              year = new Date().getFullYear();
1106          else if (year < 100)
1107              year += new Date().getFullYear() - new Date().getFullYear() % 100 +
1108                  (year <= shortYearCutoff ? 0 : -100);
1109          if (doy > -1) {
1110              month = 1;
1111              day = doy;
1112              do {
1113                  var dim = this._getDaysInMonth(year, month - 1);
1114                  if (day <= dim)
1115                      break;
1116                  month++;
1117                  day -= dim;
1118              } while (true);
1119          }
1120          var date = this._daylightSavingAdjust(new Date(year, month - 1, day));
1121          if (date.getFullYear() != year || date.getMonth() + 1 != month || date.getDate() != day)
1122              throw 'Invalid date'; // E.g. 31/02/00
1123          return date;
1124      },
1125  
1126      /* Standard date formats. */
1127      ATOM: 'yy-mm-dd', // RFC 3339 (ISO 8601)
1128      COOKIE: 'D, dd M yy',
1129      ISO_8601: 'yy-mm-dd',
1130      RFC_822: 'D, d M y',
1131      RFC_850: 'DD, dd-M-y',
1132      RFC_1036: 'D, d M y',
1133      RFC_1123: 'D, d M yy',
1134      RFC_2822: 'D, d M yy',
1135      RSS: 'D, d M y', // RFC 822
1136      TICKS: '!',
1137      TIMESTAMP: '@',
1138      W3C: 'yy-mm-dd', // ISO 8601
1139  
1140      _ticksTo1970: (((1970 - 1) * 365 + Math.floor(1970 / 4) - Math.floor(1970 / 100) +
1141          Math.floor(1970 / 400)) * 24 * 60 * 60 * 10000000),
1142  
1143      /* Format a date object into a string value.
1144         The format can be combinations of the following:
1145         d  - day of month (no leading zero)
1146         dd - day of month (two digit)
1147         o  - day of year (no leading zeros)
1148         oo - day of year (three digit)
1149         D  - day name short
1150         DD - day name long
1151         m  - month of year (no leading zero)
1152         mm - month of year (two digit)
1153         M  - month name short
1154         MM - month name long
1155         y  - year (two digit)
1156         yy - year (four digit)
1157         @ - Unix timestamp (ms since 01/01/1970)
1158         ! - Windows ticks (100ns since 01/01/0001)
1159         '...' - literal text
1160         '' - single quote
1161  
1162         @param  format    string - the desired format of the date
1163         @param  date      Date - the date value to format
1164         @param  settings  Object - attributes include:
1165                           dayNamesShort    string[7] - abbreviated names of the days from Sunday (optional)
1166                           dayNames         string[7] - names of the days from Sunday (optional)
1167                           monthNamesShort  string[12] - abbreviated names of the months (optional)
1168                           monthNames       string[12] - names of the months (optional)
1169         @return  string - the date in the above format */
1170      formatDate: function (format, date, settings) {
1171          if (!date)
1172              return '';
1173          var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
1174          var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
1175          var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
1176          var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
1177          // Check whether a format character is doubled
1178          var lookAhead = function(match) {
1179              var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
1180              if (matches)
1181                  iFormat++;
1182              return matches;
1183          };
1184          // Format a number, with leading zero if necessary
1185          var formatNumber = function(match, value, len) {
1186              var num = '' + value;
1187              if (lookAhead(match))
1188                  while (num.length < len)
1189                      num = '0' + num;
1190              return num;
1191          };
1192          // Format a name, short or long as requested
1193          var formatName = function(match, value, shortNames, longNames) {
1194              return (lookAhead(match) ? longNames[value] : shortNames[value]);
1195          };
1196          var output = '';
1197          var literal = false;
1198          if (date)
1199              for (var iFormat = 0; iFormat < format.length; iFormat++) {
1200                  if (literal)
1201                      if (format.charAt(iFormat) == "'" && !lookAhead("'"))
1202                          literal = false;
1203                      else
1204                          output += format.charAt(iFormat);
1205                  else
1206                      switch (format.charAt(iFormat)) {
1207                          case 'd':
1208                              output += formatNumber('d', date.getDate(), 2);
1209                              break;
1210                          case 'D':
1211                              output += formatName('D', date.getDay(), dayNamesShort, dayNames);
1212                              break;
1213                          case 'o':
1214                              output += formatNumber('o',
1215                                  Math.round((new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime() - new Date(date.getFullYear(), 0, 0).getTime()) / 86400000), 3);
1216                              break;
1217                          case 'm':
1218                              output += formatNumber('m', date.getMonth() + 1, 2);
1219                              break;
1220                          case 'M':
1221                              output += formatName('M', date.getMonth(), monthNamesShort, monthNames);
1222                              break;
1223                          case 'y':
1224                              output += (lookAhead('y') ? date.getFullYear() :
1225                                  (date.getYear() % 100 < 10 ? '0' : '') + date.getYear() % 100);
1226                              break;
1227                          case '@':
1228                              output += date.getTime();
1229                              break;
1230                          case '!':
1231                              output += date.getTime() * 10000 + this._ticksTo1970;
1232                              break;
1233                          case "'":
1234                              if (lookAhead("'"))
1235                                  output += "'";
1236                              else
1237                                  literal = true;
1238                              break;
1239                          default:
1240                              output += format.charAt(iFormat);
1241                      }
1242              }
1243          return output;
1244      },
1245  
1246      /* Extract all possible characters from the date format. */
1247      _possibleChars: function (format) {
1248          var chars = '';
1249          var literal = false;
1250          // Check whether a format character is doubled
1251          var lookAhead = function(match) {
1252              var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
1253              if (matches)
1254                  iFormat++;
1255              return matches;
1256          };
1257          for (var iFormat = 0; iFormat < format.length; iFormat++)
1258              if (literal)
1259                  if (format.charAt(iFormat) == "'" && !lookAhead("'"))
1260                      literal = false;
1261                  else
1262                      chars += format.charAt(iFormat);
1263              else
1264                  switch (format.charAt(iFormat)) {
1265                      case 'd': case 'm': case 'y': case '@':
1266                          chars += '0123456789';
1267                          break;
1268                      case 'D': case 'M':
1269                          return null; // Accept anything
1270                      case "'":
1271                          if (lookAhead("'"))
1272                              chars += "'";
1273                          else
1274                              literal = true;
1275                          break;
1276                      default:
1277                          chars += format.charAt(iFormat);
1278                  }
1279          return chars;
1280      },
1281  
1282      /* Get a setting value, defaulting if necessary. */
1283      _get: function(inst, name) {
1284          return inst.settings[name] !== undefined ?
1285              inst.settings[name] : this._defaults[name];
1286      },
1287  
1288      /* Parse existing date and initialise date picker. */
1289      _setDateFromField: function(inst, noDefault) {
1290          if (inst.input.val() == inst.lastVal) {
1291              return;
1292          }
1293          var dateFormat = this._get(inst, 'dateFormat');
1294          var dates = inst.lastVal = inst.input ? inst.input.val() : null;
1295          var date, defaultDate;
1296          date = defaultDate = this._getDefaultDate(inst);
1297          var settings = this._getFormatConfig(inst);
1298          try {
1299              date = this.parseDate(dateFormat, dates, settings) || defaultDate;
1300          } catch (event) {
1301              this.log(event);
1302              dates = (noDefault ? '' : dates);
1303          }
1304          inst.selectedDay = date.getDate();
1305          inst.drawMonth = inst.selectedMonth = date.getMonth();
1306          inst.drawYear = inst.selectedYear = date.getFullYear();
1307          inst.currentDay = (dates ? date.getDate() : 0);
1308          inst.currentMonth = (dates ? date.getMonth() : 0);
1309          inst.currentYear = (dates ? date.getFullYear() : 0);
1310          this._adjustInstDate(inst);
1311      },
1312  
1313      /* Retrieve the default date shown on opening. */
1314      _getDefaultDate: function(inst) {
1315          return this._restrictMinMax(inst,
1316              this._determineDate(inst, this._get(inst, 'defaultDate'), new Date()));
1317      },
1318  
1319      /* A date may be specified as an exact value or a relative one. */
1320      _determineDate: function(inst, date, defaultDate) {
1321          var offsetNumeric = function(offset) {
1322              var date = new Date();
1323              date.setDate(date.getDate() + offset);
1324              return date;
1325          };
1326          var offsetString = function(offset) {
1327              try {
1328                  return $.datepicker.parseDate($.datepicker._get(inst, 'dateFormat'),
1329                      offset, $.datepicker._getFormatConfig(inst));
1330              }
1331              catch (e) {
1332                  // Ignore
1333              }
1334              var date = (offset.toLowerCase().match(/^c/) ?
1335                  $.datepicker._getDate(inst) : null) || new Date();
1336              var year = date.getFullYear();
1337              var month = date.getMonth();
1338              var day = date.getDate();
1339              var pattern = /([+-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g;
1340              var matches = pattern.exec(offset);
1341              while (matches) {
1342                  switch (matches[2] || 'd') {
1343                      case 'd' : case 'D' :
1344                          day += parseInt(matches[1],10); break;
1345                      case 'w' : case 'W' :
1346                          day += parseInt(matches[1],10) * 7; break;
1347                      case 'm' : case 'M' :
1348                          month += parseInt(matches[1],10);
1349                          day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
1350                          break;
1351                      case 'y': case 'Y' :
1352                          year += parseInt(matches[1],10);
1353                          day = Math.min(day, $.datepicker._getDaysInMonth(year, month));
1354                          break;
1355                  }
1356                  matches = pattern.exec(offset);
1357              }
1358              return new Date(year, month, day);
1359          };
1360          var newDate = (date == null || date === '' ? defaultDate : (typeof date == 'string' ? offsetString(date) :
1361              (typeof date == 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : new Date(date.getTime()))));
1362          newDate = (newDate && newDate.toString() == 'Invalid Date' ? defaultDate : newDate);
1363          if (newDate) {
1364              newDate.setHours(0);
1365              newDate.setMinutes(0);
1366              newDate.setSeconds(0);
1367              newDate.setMilliseconds(0);
1368          }
1369          return this._daylightSavingAdjust(newDate);
1370      },
1371  
1372      /* Handle switch to/from daylight saving.
1373         Hours may be non-zero on daylight saving cut-over:
1374         > 12 when midnight changeover, but then cannot generate
1375         midnight datetime, so jump to 1AM, otherwise reset.
1376         @param  date  (Date) the date to check
1377         @return  (Date) the corrected date */
1378      _daylightSavingAdjust: function(date) {
1379          if (!date) return null;
1380          date.setHours(date.getHours() > 12 ? date.getHours() + 2 : 0);
1381          return date;
1382      },
1383  
1384      /* Set the date(s) directly. */
1385      _setDate: function(inst, date, noChange) {
1386          var clear = !date;
1387          var origMonth = inst.selectedMonth;
1388          var origYear = inst.selectedYear;
1389          var newDate = this._restrictMinMax(inst, this._determineDate(inst, date, new Date()));
1390          inst.selectedDay = inst.currentDay = newDate.getDate();
1391          inst.drawMonth = inst.selectedMonth = inst.currentMonth = newDate.getMonth();
1392          inst.drawYear = inst.selectedYear = inst.currentYear = newDate.getFullYear();
1393          if ((origMonth != inst.selectedMonth || origYear != inst.selectedYear) && !noChange)
1394              this._notifyChange(inst);
1395          this._adjustInstDate(inst);
1396          if (inst.input) {
1397              inst.input.val(clear ? '' : this._formatDate(inst));
1398          }
1399      },
1400  
1401      /* Retrieve the date(s) directly. */
1402      _getDate: function(inst) {
1403          var startDate = (!inst.currentYear || (inst.input && inst.input.val() == '') ? null :
1404              this._daylightSavingAdjust(new Date(
1405              inst.currentYear, inst.currentMonth, inst.currentDay)));
1406              return startDate;
1407      },
1408  
1409      /* Attach the onxxx handlers.  These are declared statically so
1410       * they work with static code transformers like Caja.
1411       */
1412      _attachHandlers: function(inst) {
1413          var stepMonths = this._get(inst, 'stepMonths');
1414          var id = '#' + inst.id.replace( /\\\\/g, "\\" );
1415          inst.dpDiv.find('[data-handler]').map(function () {
1416              var handler = {
1417                  prev: function () {
1418                      window['DP_jQuery_' + dpuuid].datepicker._adjustDate(id, -stepMonths, 'M');
1419                  },
1420                  next: function () {
1421                      window['DP_jQuery_' + dpuuid].datepicker._adjustDate(id, +stepMonths, 'M');
1422                  },
1423                  hide: function () {
1424                      window['DP_jQuery_' + dpuuid].datepicker._hideDatepicker();
1425                  },
1426                  today: function () {
1427                      window['DP_jQuery_' + dpuuid].datepicker._gotoToday(id);
1428                  },
1429                  selectDay: function () {
1430                      window['DP_jQuery_' + dpuuid].datepicker._selectDay(id, +this.getAttribute('data-month'), +this.getAttribute('data-year'), this);
1431                      return false;
1432                  },
1433                  selectMonth: function () {
1434                      window['DP_jQuery_' + dpuuid].datepicker._selectMonthYear(id, this, 'M');
1435                      return false;
1436                  },
1437                  selectYear: function () {
1438                      window['DP_jQuery_' + dpuuid].datepicker._selectMonthYear(id, this, 'Y');
1439                      return false;
1440                  }
1441              };
1442              $(this).bind(this.getAttribute('data-event'), handler[this.getAttribute('data-handler')]);
1443          });
1444      },
1445  
1446      /* Generate the HTML for the current state of the date picker. */
1447      _generateHTML: function(inst) {
1448          var today = new Date();
1449          today = this._daylightSavingAdjust(
1450              new Date(today.getFullYear(), today.getMonth(), today.getDate())); // clear time
1451          var isRTL = this._get(inst, 'isRTL');
1452          var showButtonPanel = this._get(inst, 'showButtonPanel');
1453          var hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext');
1454          var navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat');
1455          var numMonths = this._getNumberOfMonths(inst);
1456          var showCurrentAtPos = this._get(inst, 'showCurrentAtPos');
1457          var stepMonths = this._get(inst, 'stepMonths');
1458          var isMultiMonth = (numMonths[0] != 1 || numMonths[1] != 1);
1459          var currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :
1460              new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
1461          var minDate = this._getMinMaxDate(inst, 'min');
1462          var maxDate = this._getMinMaxDate(inst, 'max');
1463          var drawMonth = inst.drawMonth - showCurrentAtPos;
1464          var drawYear = inst.drawYear;
1465          if (drawMonth < 0) {
1466              drawMonth += 12;
1467              drawYear--;
1468          }
1469          if (maxDate) {
1470              var maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),
1471                  maxDate.getMonth() - (numMonths[0] * numMonths[1]) + 1, maxDate.getDate()));
1472              maxDraw = (minDate && maxDraw < minDate ? minDate : maxDraw);
1473              while (this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1)) > maxDraw) {
1474                  drawMonth--;
1475                  if (drawMonth < 0) {
1476                      drawMonth = 11;
1477                      drawYear--;
1478                  }
1479              }
1480          }
1481          inst.drawMonth = drawMonth;
1482          inst.drawYear = drawYear;
1483          var prevText = this._get(inst, 'prevText');
1484          prevText = (!navigationAsDateFormat ? prevText : this.formatDate(prevText,
1485              this._daylightSavingAdjust(new Date(drawYear, drawMonth - stepMonths, 1)),
1486              this._getFormatConfig(inst)));
1487          var prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?
1488              '<a class="ui-datepicker-prev ui-corner-all" data-handler="prev" data-event="click"' +
1489              ' title="' + prevText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>' :
1490              (hideIfNoPrevNext ? '' : '<a class="ui-datepicker-prev ui-corner-all ui-state-disabled" title="'+ prevText +'"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>'));
1491          var nextText = this._get(inst, 'nextText');
1492          nextText = (!navigationAsDateFormat ? nextText : this.formatDate(nextText,
1493              this._daylightSavingAdjust(new Date(drawYear, drawMonth + stepMonths, 1)),
1494              this._getFormatConfig(inst)));
1495          var next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
1496              '<a class="ui-datepicker-next ui-corner-all" data-handler="next" data-event="click"' +
1497              ' title="' + nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>' :
1498              (hideIfNoPrevNext ? '' : '<a class="ui-datepicker-next ui-corner-all ui-state-disabled" title="'+ nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>'));
1499          var currentText = this._get(inst, 'currentText');
1500          var gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today);
1501          currentText = (!navigationAsDateFormat ? currentText :
1502              this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));
1503          var controls = (!inst.inline ? '<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" data-handler="hide" data-event="click">' +
1504              this._get(inst, 'closeText') + '</button>' : '');
1505          var buttonPanel = (showButtonPanel) ? '<div class="ui-datepicker-buttonpane ui-widget-content">' + (isRTL ? controls : '') +
1506              (this._isInRange(inst, gotoDate) ? '<button type="button" class="ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all" data-handler="today" data-event="click"' +
1507              '>' + currentText + '</button>' : '') + (isRTL ? '' : controls) + '</div>' : '';
1508          var firstDay = parseInt(this._get(inst, 'firstDay'),10);
1509          firstDay = (isNaN(firstDay) ? 0 : firstDay);
1510          var showWeek = this._get(inst, 'showWeek');
1511          var dayNames = this._get(inst, 'dayNames');
1512          var dayNamesShort = this._get(inst, 'dayNamesShort');
1513          var dayNamesMin = this._get(inst, 'dayNamesMin');
1514          var monthNames = this._get(inst, 'monthNames');
1515          var monthNamesShort = this._get(inst, 'monthNamesShort');
1516          var beforeShowDay = this._get(inst, 'beforeShowDay');
1517          var showOtherMonths = this._get(inst, 'showOtherMonths');
1518          var selectOtherMonths = this._get(inst, 'selectOtherMonths');
1519          var calculateWeek = this._get(inst, 'calculateWeek') || this.iso8601Week;
1520          var defaultDate = this._getDefaultDate(inst);
1521          var html = '';
1522          for (var row = 0; row < numMonths[0]; row++) {
1523              var group = '';
1524              this.maxRows = 4;
1525              for (var col = 0; col < numMonths[1]; col++) {
1526                  var selectedDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, inst.selectedDay));
1527                  var cornerClass = ' ui-corner-all';
1528                  var calender = '';
1529                  if (isMultiMonth) {
1530                      calender += '<div class="ui-datepicker-group';
1531                      if (numMonths[1] > 1)
1532                          switch (col) {
1533                              case 0: calender += ' ui-datepicker-group-first';
1534                                  cornerClass = ' ui-corner-' + (isRTL ? 'right' : 'left'); break;
1535                              case numMonths[1]-1: calender += ' ui-datepicker-group-last';
1536                                  cornerClass = ' ui-corner-' + (isRTL ? 'left' : 'right'); break;
1537                              default: calender += ' ui-datepicker-group-middle'; cornerClass = ''; break;
1538                          }
1539                      calender += '">';
1540                  }
1541                  calender += '<div class="ui-datepicker-header ui-widget-header ui-helper-clearfix' + cornerClass + '">' +
1542                      (/all|left/.test(cornerClass) && row == 0 ? (isRTL ? next : prev) : '') +
1543                      (/all|right/.test(cornerClass) && row == 0 ? (isRTL ? prev : next) : '') +
1544                      this._generateMonthYearHeader(inst, drawMonth, drawYear, minDate, maxDate,
1545                      row > 0 || col > 0, monthNames, monthNamesShort) + // draw month headers
1546                      '</div><table class="ui-datepicker-calendar"><thead>' +
1547                      '<tr>';
1548                  var thead = (showWeek ? '<th class="ui-datepicker-week-col">' + this._get(inst, 'weekHeader') + '</th>' : '');
1549                  for (var dow = 0; dow < 7; dow++) { // days of the week
1550                      var day = (dow + firstDay) % 7;
1551                      thead += '<th' + ((dow + firstDay + 6) % 7 >= 5 ? ' class="ui-datepicker-week-end"' : '') + '>' +
1552                          '<span title="' + dayNames[day] + '">' + dayNamesMin[day] + '</span></th>';
1553                  }
1554                  calender += thead + '</tr></thead><tbody>';
1555                  var daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
1556                  if (drawYear == inst.selectedYear && drawMonth == inst.selectedMonth)
1557                      inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);
1558                  var leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
1559                  var curRows = Math.ceil((leadDays + daysInMonth) / 7); // calculate the number of rows to generate
1560                  var numRows = (isMultiMonth ? this.maxRows > curRows ? this.maxRows : curRows : curRows); //If multiple months, use the higher number of rows (see #7043)
1561                  this.maxRows = numRows;
1562                  var printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));
1563                  for (var dRow = 0; dRow < numRows; dRow++) { // create date picker rows
1564                      calender += '<tr>';
1565                      var tbody = (!showWeek ? '' : '<td class="ui-datepicker-week-col">' +
1566                          this._get(inst, 'calculateWeek')(printDate) + '</td>');
1567                      for (var dow = 0; dow < 7; dow++) { // create date picker days
1568                          var daySettings = (beforeShowDay ?
1569                              beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, '']);
1570                          var otherMonth = (printDate.getMonth() != drawMonth);
1571                          var unselectable = (otherMonth && !selectOtherMonths) || !daySettings[0] ||
1572                              (minDate && printDate < minDate) || (maxDate && printDate > maxDate);
1573                          tbody += '<td class="' +
1574                              ((dow + firstDay + 6) % 7 >= 5 ? ' ui-datepicker-week-end' : '') + // highlight weekends
1575                              (otherMonth ? ' ui-datepicker-other-month' : '') + // highlight days from other months
1576                              ((printDate.getTime() == selectedDate.getTime() && drawMonth == inst.selectedMonth && inst._keyEvent) || // user pressed key
1577                              (defaultDate.getTime() == printDate.getTime() && defaultDate.getTime() == selectedDate.getTime()) ?
1578                              // or defaultDate is current printedDate and defaultDate is selectedDate
1579                              ' ' + this._dayOverClass : '') + // highlight selected day
1580                              (unselectable ? ' ' + this._unselectableClass + ' ui-state-disabled': '') +  // highlight unselectable days
1581                              (otherMonth && !showOtherMonths ? '' : ' ' + daySettings[1] + // highlight custom dates
1582                              (printDate.getTime() == currentDate.getTime() ? ' ' + this._currentClass : '') + // highlight selected day
1583                              (printDate.getTime() == today.getTime() ? ' ui-datepicker-today' : '')) + '"' + // highlight today (if different)
1584                              ((!otherMonth || showOtherMonths) && daySettings[2] ? ' title="' + daySettings[2] + '"' : '') + // cell title
1585                              (unselectable ? '' : ' data-handler="selectDay" data-event="click" data-month="' + printDate.getMonth() + '" data-year="' + printDate.getFullYear() + '"') + '>' + // actions
1586                              (otherMonth && !showOtherMonths ? '&#xa0;' : // display for other months
1587                              (unselectable ? '<span class="ui-state-default">' + printDate.getDate() + '</span>' : '<a class="ui-state-default' +
1588                              (printDate.getTime() == today.getTime() ? ' ui-state-highlight' : '') +
1589                              (printDate.getTime() == currentDate.getTime() ? ' ui-state-active' : '') + // highlight selected day
1590                              (otherMonth ? ' ui-priority-secondary' : '') + // distinguish dates from other months
1591                              '" href="#">' + printDate.getDate() + '</a>')) + '</td>'; // display selectable date
1592                          printDate.setDate(printDate.getDate() + 1);
1593                          printDate = this._daylightSavingAdjust(printDate);
1594                      }
1595                      calender += tbody + '</tr>';
1596                  }
1597                  drawMonth++;
1598                  if (drawMonth > 11) {
1599                      drawMonth = 0;
1600                      drawYear++;
1601                  }
1602                  calender += '</tbody></table>' + (isMultiMonth ? '</div>' +
1603                              ((numMonths[0] > 0 && col == numMonths[1]-1) ? '<div class="ui-datepicker-row-break"></div>' : '') : '');
1604                  group += calender;
1605              }
1606              html += group;
1607          }
1608          html += buttonPanel + ($.ui.ie6 && !inst.inline ?
1609              '<iframe src="javascript:false;" class="ui-datepicker-cover" frameborder="0"></iframe>' : '');
1610          inst._keyEvent = false;
1611          return html;
1612      },
1613  
1614      /* Generate the month and year header. */
1615      _generateMonthYearHeader: function(inst, drawMonth, drawYear, minDate, maxDate,
1616              secondary, monthNames, monthNamesShort) {
1617          var changeMonth = this._get(inst, 'changeMonth');
1618          var changeYear = this._get(inst, 'changeYear');
1619          var showMonthAfterYear = this._get(inst, 'showMonthAfterYear');
1620          var html = '<div class="ui-datepicker-title">';
1621          var monthHtml = '';
1622          // month selection
1623          if (secondary || !changeMonth)
1624              monthHtml += '<span class="ui-datepicker-month">' + monthNames[drawMonth] + '</span>';
1625          else {
1626              var inMinYear = (minDate && minDate.getFullYear() == drawYear);
1627              var inMaxYear = (maxDate && maxDate.getFullYear() == drawYear);
1628              monthHtml += '<select class="ui-datepicker-month" data-handler="selectMonth" data-event="change">';
1629              for (var month = 0; month < 12; month++) {
1630                  if ((!inMinYear || month >= minDate.getMonth()) &&
1631                          (!inMaxYear || month <= maxDate.getMonth()))
1632                      monthHtml += '<option value="' + month + '"' +
1633                          (month == drawMonth ? ' selected="selected"' : '') +
1634                          '>' + monthNamesShort[month] + '</option>';
1635              }
1636              monthHtml += '</select>';
1637          }
1638          if (!showMonthAfterYear)
1639              html += monthHtml + (secondary || !(changeMonth && changeYear) ? '&#xa0;' : '');
1640          // year selection
1641          if ( !inst.yearshtml ) {
1642              inst.yearshtml = '';
1643              if (secondary || !changeYear)
1644                  html += '<span class="ui-datepicker-year">' + drawYear + '</span>';
1645              else {
1646                  // determine range of years to display
1647                  var years = this._get(inst, 'yearRange').split(':');
1648                  var thisYear = new Date().getFullYear();
1649                  var determineYear = function(value) {
1650                      var year = (value.match(/c[+-].*/) ? drawYear + parseInt(value.substring(1), 10) :
1651                          (value.match(/[+-].*/) ? thisYear + parseInt(value, 10) :
1652                          parseInt(value, 10)));
1653                      return (isNaN(year) ? thisYear : year);
1654                  };
1655                  var year = determineYear(years[0]);
1656                  var endYear = Math.max(year, determineYear(years[1] || ''));
1657                  year = (minDate ? Math.max(year, minDate.getFullYear()) : year);
1658                  endYear = (maxDate ? Math.min(endYear, maxDate.getFullYear()) : endYear);
1659                  inst.yearshtml += '<select class="ui-datepicker-year" data-handler="selectYear" data-event="change">';
1660                  for (; year <= endYear; year++) {
1661                      inst.yearshtml += '<option value="' + year + '"' +
1662                          (year == drawYear ? ' selected="selected"' : '') +
1663                          '>' + year + '</option>';
1664                  }
1665                  inst.yearshtml += '</select>';
1666  
1667                  html += inst.yearshtml;
1668                  inst.yearshtml = null;
1669              }
1670          }
1671          html += this._get(inst, 'yearSuffix');
1672          if (showMonthAfterYear)
1673              html += (secondary || !(changeMonth && changeYear) ? '&#xa0;' : '') + monthHtml;
1674          html += '</div>'; // Close datepicker_header
1675          return html;
1676      },
1677  
1678      /* Adjust one of the date sub-fields. */
1679      _adjustInstDate: function(inst, offset, period) {
1680          var year = inst.drawYear + (period == 'Y' ? offset : 0);
1681          var month = inst.drawMonth + (period == 'M' ? offset : 0);
1682          var day = Math.min(inst.selectedDay, this._getDaysInMonth(year, month)) +
1683              (period == 'D' ? offset : 0);
1684          var date = this._restrictMinMax(inst,
1685              this._daylightSavingAdjust(new Date(year, month, day)));
1686          inst.selectedDay = date.getDate();
1687          inst.drawMonth = inst.selectedMonth = date.getMonth();
1688          inst.drawYear = inst.selectedYear = date.getFullYear();
1689          if (period == 'M' || period == 'Y')
1690              this._notifyChange(inst);
1691      },
1692  
1693      /* Ensure a date is within any min/max bounds. */
1694      _restrictMinMax: function(inst, date) {
1695          var minDate = this._getMinMaxDate(inst, 'min');
1696          var maxDate = this._getMinMaxDate(inst, 'max');
1697          var newDate = (minDate && date < minDate ? minDate : date);
1698          newDate = (maxDate && newDate > maxDate ? maxDate : newDate);
1699          return newDate;
1700      },
1701  
1702      /* Notify change of month/year. */
1703      _notifyChange: function(inst) {
1704          var onChange = this._get(inst, 'onChangeMonthYear');
1705          if (onChange)
1706              onChange.apply((inst.input ? inst.input[0] : null),
1707                  [inst.selectedYear, inst.selectedMonth + 1, inst]);
1708      },
1709  
1710      /* Determine the number of months to show. */
1711      _getNumberOfMonths: function(inst) {
1712          var numMonths = this._get(inst, 'numberOfMonths');
1713          return (numMonths == null ? [1, 1] : (typeof numMonths == 'number' ? [1, numMonths] : numMonths));
1714      },
1715  
1716      /* Determine the current maximum date - ensure no time components are set. */
1717      _getMinMaxDate: function(inst, minMax) {
1718          return this._determineDate(inst, this._get(inst, minMax + 'Date'), null);
1719      },
1720  
1721      /* Find the number of days in a given month. */
1722      _getDaysInMonth: function(year, month) {
1723          return 32 - this._daylightSavingAdjust(new Date(year, month, 32)).getDate();
1724      },
1725  
1726      /* Find the day of the week of the first of a month. */
1727      _getFirstDayOfMonth: function(year, month) {
1728          return new Date(year, month, 1).getDay();
1729      },
1730  
1731      /* Determines if we should allow a "next/prev" month display change. */
1732      _canAdjustMonth: function(inst, offset, curYear, curMonth) {
1733          var numMonths = this._getNumberOfMonths(inst);
1734          var date = this._daylightSavingAdjust(new Date(curYear,
1735              curMonth + (offset < 0 ? offset : numMonths[0] * numMonths[1]), 1));
1736          if (offset < 0)
1737              date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
1738          return this._isInRange(inst, date);
1739      },
1740  
1741      /* Is the given date in the accepted range? */
1742      _isInRange: function(inst, date) {
1743          var minDate = this._getMinMaxDate(inst, 'min');
1744          var maxDate = this._getMinMaxDate(inst, 'max');
1745          return ((!minDate || date.getTime() >= minDate.getTime()) &&
1746              (!maxDate || date.getTime() <= maxDate.getTime()));
1747      },
1748  
1749      /* Provide the configuration settings for formatting/parsing. */
1750      _getFormatConfig: function(inst) {
1751          var shortYearCutoff = this._get(inst, 'shortYearCutoff');
1752          shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
1753              new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
1754          return {shortYearCutoff: shortYearCutoff,
1755              dayNamesShort: this._get(inst, 'dayNamesShort'), dayNames: this._get(inst, 'dayNames'),
1756              monthNamesShort: this._get(inst, 'monthNamesShort'), monthNames: this._get(inst, 'monthNames')};
1757      },
1758  
1759      /* Format the given date for display. */
1760      _formatDate: function(inst, day, month, year) {
1761          if (!day) {
1762              inst.currentDay = inst.selectedDay;
1763              inst.currentMonth = inst.selectedMonth;
1764              inst.currentYear = inst.selectedYear;
1765          }
1766          var date = (day ? (typeof day == 'object' ? day :
1767              this._daylightSavingAdjust(new Date(year, month, day))) :
1768              this._daylightSavingAdjust(new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
1769          return this.formatDate(this._get(inst, 'dateFormat'), date, this._getFormatConfig(inst));
1770      }
1771  });
1772  
1773  /*
1774   * Bind hover events for datepicker elements.
1775   * Done via delegate so the binding only occurs once in the lifetime of the parent div.
1776   * Global instActive, set by _updateDatepicker allows the handlers to find their way back to the active picker.
1777   */
1778  function bindHover(dpDiv) {
1779      var selector = 'button, .ui-datepicker-prev, .ui-datepicker-next, .ui-datepicker-calendar td a';
1780      return dpDiv.delegate(selector, 'mouseout', function() {
1781              $(this).removeClass('ui-state-hover');
1782              if (this.className.indexOf('ui-datepicker-prev') != -1) $(this).removeClass('ui-datepicker-prev-hover');
1783              if (this.className.indexOf('ui-datepicker-next') != -1) $(this).removeClass('ui-datepicker-next-hover');
1784          })
1785          .delegate(selector, 'mouseover', function(){
1786              if (!$.datepicker._isDisabledDatepicker( instActive.inline ? dpDiv.parent()[0] : instActive.input[0])) {
1787                  $(this).parents('.ui-datepicker-calendar').find('a').removeClass('ui-state-hover');
1788                  $(this).addClass('ui-state-hover');
1789                  if (this.className.indexOf('ui-datepicker-prev') != -1) $(this).addClass('ui-datepicker-prev-hover');
1790                  if (this.className.indexOf('ui-datepicker-next') != -1) $(this).addClass('ui-datepicker-next-hover');
1791              }
1792          });
1793  }
1794  
1795  /* jQuery extend now ignores nulls! */
1796  function extendRemove(target, props) {
1797      $.extend(target, props);
1798      for (var name in props)
1799          if (props[name] == null || props[name] == undefined)
1800              target[name] = props[name];
1801      return target;
1802  };
1803  
1804  /* Invoke the datepicker functionality.
1805     @param  options  string - a command, optionally followed by additional parameters or
1806                      Object - settings for attaching new datepicker functionality
1807     @return  jQuery object */
1808  $.fn.datepicker = function(options){
1809  
1810      /* Verify an empty collection wasn't passed - Fixes #6976 */
1811      if ( !this.length ) {
1812          return this;
1813      }
1814  
1815      /* Initialise the date picker. */
1816      if (!$.datepicker.initialized) {
1817          $(document).mousedown($.datepicker._checkExternalClick).
1818              find(document.body).append($.datepicker.dpDiv);
1819          $.datepicker.initialized = true;
1820      }
1821  
1822      var otherArgs = Array.prototype.slice.call(arguments, 1);
1823      if (typeof options == 'string' && (options == 'isDisabled' || options == 'getDate' || options == 'widget'))
1824          return $.datepicker['_' + options + 'Datepicker'].
1825              apply($.datepicker, [this[0]].concat(otherArgs));
1826      if (options == 'option' && arguments.length == 2 && typeof arguments[1] == 'string')
1827          return $.datepicker['_' + options + 'Datepicker'].
1828              apply($.datepicker, [this[0]].concat(otherArgs));
1829      return this.each(function() {
1830          typeof options == 'string' ?
1831              $.datepicker['_' + options + 'Datepicker'].
1832                  apply($.datepicker, [this].concat(otherArgs)) :
1833              $.datepicker._attachDatepicker(this, options);
1834      });
1835  };
1836  
1837  $.datepicker = new Datepicker(); // singleton instance
1838  $.datepicker.initialized = false;
1839  $.datepicker.uuid = new Date().getTime();
1840  $.datepicker.version = "1.9.2";
1841  
1842  // Workaround for #4055
1843  // Add another global to avoid noConflict issues with inline event handlers
1844  window['DP_jQuery_' + dpuuid] = $;
1845  
1846  })(jQuery);