A container that is displayed as a popup. The popup window does not have any special frame. Popups can be displayed when an element is clicked by assigning the id of the popup to either the XulElement.setPopup(java.lang.String), XulElement.setContext(java.lang.String) or XulElement.setTooltip(java.lang.String) attribute of the element.

<label value="Move Mouse Over Me!" tooltip="editPopup"/>
    <separator bar="true"/>    
    <label value="Tooptip for Another Popup" tooltip="any"/>    
    <separator bar="true"/>    
    ...    
    <popup id="any" width="300px">    
        <vbox>        
            ZK simply rich.            
            <toolbarbutton label="ZK your killer Web application now!" href="http://www.zkoss.org"/>            
        </vbox>        
    </popup>