rem: dump("DragOverTree\n"); dump(event + "\n"); return true; 
add: var validFlavor = false; var dragSession = null; var retVal = true;  var dragService = GetDragService(); if ( !dragService )	return(false);  dragSession = dragService.getCurrentSession(); if ( !dragSession )	return(false);  if ( dragSession.isDataFlavorSupported("text/nsmessage") )	validFlavor = true;    if ( validFlavor ) {  var rowGroup = event.target.parentNode.parentNode; rowGroup.setAttribute ( "dd-triggerrepaint", 0 ); dragSession.canDrop = true;  retVal = false; } return(retVal); 
context: function DragOverTree(event){	dump("DragOverTree\n");	dump(event + "\n");	return true;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/6b0e568cd898d5eaabce8be57c4466a75602daa9/messengerdnd.js/clean/mailnews/base/resources/content/messengerdnd.js