dom parser issue

gistfile1.js

function displayLocationInfo(xml){
	$("soap").update(xml);
	var parser = new DOMParser();
	var doc = parser.parseFromString(xml, "application/xml");
	var rootElement = doc.documentElement;
	var queryColumns = rootElement.getElementsByTagName("QueryResponseHelper");
	WL.Logger.debug("client value:  "+ xml);
	var item, i;
	var ul = $('locationList');
	for(i = 0; i < queryColumns.length; i += 1){
		item = queryColumns[i];
		li = new Element('li');
		text = new Element('div', {'class' : 'locationRecord'}).update(item.recordId.nodeValue);
		li.insert(text);
		ul.insert(li);
		//li.observe('click', selectTab.bind(this, LOCATION_DESCRIPTION_TAB, item, li));
	}
	afterDisplayItems();
}