rem: return; 
add: return null; 
context: DWRUtil.cloneNode = function(ele)  {  var orig = ele;  ele = $(ele);  if (ele == null) {    DWRUtil.debug("cloneNode() can't find an element with id: " + orig + ".");    return;  }  var clone = ele.cloneNode(true);  DWRUtil._removeIds(clone);  ele.parentNode.insertBefore(clone, ele);  return clone;}
meta: 266	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/266/fbe7e86c9bd6b849e8142920ba97e000e9c7ec62/util.js/clean/java/org/directwebremoting/util.js