add:  if (!anchor) return; 
context: function setTypeinValue(anchor) {	if (!typeinFrame) return;	var value = anchor.getAttribute("id");	if (value) {		typeinFrame.currentId = value;	} else {		typeinFrame.currentId = "";		if (isIE)			value = anchor.innerText;		else if (isMozilla)			value = anchor.lastChild.nodeValue;		if (!value)			value = "";	}	typeinFrame.typein.value = value;	typeinFrame.typein.previous = value;}
meta: 10107	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10107/3c55a1be3c70fe1e8b44a7ce3db64b2c1f3ea3e5/indexView.js/buggy/org.eclipse.help.webapp/advanced/indexView.js