rem: if(this.request_obj.responseXML && typeof(this.request_obj.responseXML) != 'undefined') { response_xml = this.request_obj.responseXML; 
add: if(typeof(this.request_obj.responseXML) != 'undefined' && this.request_obj.responseXML) {  response_xml		= this.request_obj.responseXML;   if(typeof(response_xml.firstChild) != 'undefined') { response_xml	= response_xml.firstChild; } 
context: 	getResponseXML: function() {		var response_xml = null;		if(this.request_obj && typeof(this.request_obj) != 'undefined') {			if(this.request_obj.responseXML && typeof(this.request_obj.responseXML) != 'undefined') {				response_xml = this.request_obj.responseXML;			}		}		return response_xml;	},
meta: 8193	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8193/147713161255882c8cfb87e96f96becac06064f2/k4_http.js/buggy/trunk/upload/js/k4_http.js