Why will it not work?

programming flash
1

this code should work, shouldn’t it?

 myTreeListener = new Object();
myTreeListener.change = function(evtObject:Object) {
 var selectLabel:String = evtObject.target.selectedItem.attributes.label;
 var selectData:String = evtObject.target.selectedItem.attributes.data;
 txtMess.text = "<a href='"+selectData+"'>"+ selectLabel +"</a>";
 this.getURL('"+ selectData +"');
}  
xmlTree.addEventListener("change", myTreeListener);

It will not open the URL.