// JavaScript Document
function AJAX_alertRequest(url) {
	if (http_request = AJAX_getHttpRequest()) {
    	http_request.onreadystatechange = function() {AJAX_alertContents(http_request); };
    	http_request.open('GET', url, true);
    	http_request.send(null);
	}
}

function AJAX_getHttpRequest() {
	var http_request = false;
  	if (window.XMLHttpRequest) { // Mozilla, Safari,...
    	http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
        	http_request.overrideMimeType('text/xml');
            // See note below about this line
        }
	} 
	else if (window.ActiveXObject) { // IE
    	try {
        	http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
        	try {
            	http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
	}
    if (!http_request) {
    	alert('Cannot create an XMLHTTP instance');
        return false;
    }
	else {
		return http_request;
	}
}

function AJAX_alertContents(http_request) {
	if (http_request.readyState == 4) {
    	if (http_request.status == 200) {
        	var xmldoc = http_request.responseXML;
            var root_node = xmldoc.getElementsByTagName('root').item(0);
			alert(root_node.firstChild.data);
        } 
		else {
        	alert('There was a problem with the request.');
        }
	}
}