rem: e.parentNode.removeChild(e); 
add: if (e != null) { e.parentNode.removeChild(e); } else {  alert("Can't find node with id " + prefix + nodeList[i] + ". This shouldn't happen - possible bug in tree?"); } 
context: Wicket.Tree.removeNodes = function(prefix, nodeList) {	for (var i in nodeList) {		var e = document.getElementById(prefix + nodeList[i]);		e.parentNode.removeChild(e);	}}
meta: 1204	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1204/d7dc1d8dac04bef0cd262e85b8c306ca92a2eb17/tree.js/clean/wicket-sandbox/users/matej_k/tree/src/wicket/xtree/res/tree.js