function get_xml_then(url_obj, cb_obj, custom_error_msg) {
var req;
var xml_error_message = (custom_error_msg!=undefined) ? custom_error_msg:"Error";

if (!url_obj.url) {
	alert(xml_error_message);
	return false;
	}
if (!cb_obj) {
	cb_obj = new Object();
	}

var url       = url_obj.url;
var method    = "GET";
var cb_func   = (cb_obj.func)    ? (cb_obj.func):("");
var cb_arg    = (cb_obj.arg)     ? ((cb_obj.arg.toLowerCase()!="xml") ? ("req.responseText"):("req.responseXML")):("req.responseText");
var cb_custom = (cb_obj.custom)  ? (cb_obj.custom):("");

if (window.XMLHttpRequest) {
	// branch for native XMLHttpRequest object
	//alert('XMLHttpRequest');
	req = new XMLHttpRequest();
	req.onreadystatechange = function() {
		// only if req shows "loaded"
		if (req.readyState == 4) {
			// only if "OK"
			if (req.status == 200) {
				// ...processing statements go here...
				if (cb_func) {
					cb_func+="("+cb_arg+")";
					eval(cb_func);
				}
				else if (cb_custom) {
					eval(cb_custom);
				}
				//else no actions to take =>send to server only
			}
			else {
				alert("ERROR: "+xml_error_message+"\n\n"+req.statusText);
				return false;
			}
		}
	}
	req.open(method, url, true);
	req.send(null);
}
else if (window.ActiveXObject) {
	//alert('ActiveXObject');
	// branch for IE/Windows ActiveX version
	req = new ActiveXObject("Microsoft.XMLHTTP");
	if (req) {
		req.onreadystatechange = function() {
			// only if req shows "loaded"
			if (req.readyState == 4) {
				// only if "OK"
				if (req.status == 200) {
					// ...processing statements go here...
					if (cb_func) {
						cb_func+="("+cb_arg+")";
						eval(cb_func);
					}
					else if (cb_custom){
						eval(cb_custom);
					}
					//else no actions to take =>send to server only
				}
				else {
					alert("ERROR: "+xml_error_message+"\n\n"+req.statusText);
					return false;
				}
			}
		}
		req.open(method, url, true);
		req.send();
	}
}
}


function get_node_value(xml_str,node_name) {
cdata_section = "<![CDATA[";
index_begin = xml_str.indexOf("<"+node_name);
index_end   = (xml_str.indexOf("</"+node_name)!=-1) ? xml_str.indexOf("</"+node_name):index_begin;

node_value = (index_begin!=index_end) ? xml_str.substring(xml_str.indexOf(">",index_begin)+1, index_end):"";
if (node_value.indexOf(cdata_section)!=-1) {
    node_value = node_value.substring( node_value.indexOf(cdata_section) + cdata_section.length, node_value.lastIndexOf("]]>"));
    }

return node_value;
}