text: 
  /* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
  
  /**
   * @class a DragDrop implementation that moves the object as it is being dragged,
   * and keeps the object being dragged on top.  This is a subclass of ygDD rather
   * than DragDrop, and inherits the implementation of most of the event listeners
   * from that class.
   *
   * @extends ygDD
   * @constructor
   * @param {String} id the id of the linked element
   * @param {String} sGroup the group of related DragDrop items
   */
  function ygDDOnTop(id, sGroup) {
  	if (id) {
  		this.init(id, sGroup);
  		this.logger = new ygLogger("ygDDOnTop");
  	}
  }
  
  ygDDOnTop.prototype = new YAHOO.util.DD();
  
  /**
   * The inital z-index of the element, stored so we can restore it later
   *
   * @type int
   */
  ygDDOnTop.prototype.origZ = 0;
  
  ygDDOnTop.prototype.startDrag = function(x, y) {
  	this.logger.debug(this.id + " startDrag");
  
  	var style = this.getEl().style;
  
  	// store the original z-index
  	this.origZ = style.zIndex;
  
  	// The z-index needs to be set very high so the element will indeed be on top
  	style.zIndex = 999;
  }
  
  ygDDOnTop.prototype.endDrag = function(e) {
  	this.logger.debug(this.id + " endDrag");
  
  	// restore the original z-index
  	this.getEl().style.zIndex = this.origZ;
  };
  