<class name="dragger" >
            ...
            <method event="onmousedown">
                checkdrag.apply();
            </method>
            <method event="onmouseup">
                canvas.dragimage.stopdrag(this);
                checkdrag.remove();
            </method>

            <checkdragstate name="checkdrag" draggername="dragimage"/>
        </class>
        

        <class name="droptarget">
            ...
            <method name="init">
                super.init();
                LzTrack.register(this, 'target');
            </method>

            <method event="onmousetrackover">
               setAttribute('bgcolor', 0xffff00); // hilite
            </method>
            <method event="onmousetrackout">
               setAttribute('bgcolor', null); // normal
            </method>
            <method event="onmousetrackup">
               setAttribute('bgcolor', null); // normal
               canvas.dragimage.dropcomplete(this);
               Debug.write('dropped: '+dragimage.source.text);
            </method>
        </class>