code: function ( DragEvent ) { 
  		// dataTransfer.setData is mandatory for FF but is not known by IE -> try catch...
  		try {
  			DragEvent.dataTransfer.setData ( 'PinRange', DragEvent.target.dataset.pinRange );
  		}
  		catch ( e ) {
  		}
  		_DraggedPinRange = DragEvent.target.dataset.pinRange;
  		DragEvent.stopPropagation ( );
  	}
docs: /*
  
  --- _onDragStart( DragEvent ) ---
  
  dragstart event handler
  
  This event store the pin position ... it's needed for the ondrop event