docs: function mxCellTracker(graph, color, funct)
  {
  	mxCellMarker.call(this, graph, color);
  
  	this.graph.addMouseListener(this);
  	
  	if (funct != null)
  	{
  		this.getCell = funct;
  	}
  	
  	// Automatic deallocation of memory
  	if (mxClient.IS_IE)
  	{
  		mxEvent.addListener(window, 'unload', mxUtils.bind(this, function()
  		{
  			this.destroy();
  		}));
  	}
  }