function initAjax(){

        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('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }


	return http_request;
}




function getResponse(http_request) {

        if (http_request.readyState == 4) {
            if (http_request.status == 200) {

		var error_div = document.getElementById('errorDiv');
		var xmldoc = http_request.responseXML;
		var root_nodes = xmldoc.getElementsByTagName("root");
		var error_node = root_nodes[0].getElementsByTagName("error");
		var info_node = root_nodes[0].getElementsByTagName("info");

		error_div.style.display = '';

		if(error_node.length > 0){error_div.innerHTML = error_node[0].firstChild.nodeValue;}
		else if(info_node.length > 0){error_div.innerHTML = info_node[0].firstChild.nodeValue;}
		else {error_div.innerHTML = "";}

            } else {
                alert('There was a problem with the request.');
            }
        }
}