function xmlInit(filename) {
    xmlDoc = null;
    new Ajax.Request(filename, {
        method: "get",
        asynchronous: false,
        onSuccess: function(resp, jsonObj) {
            xmlDoc = resp.responseXML;
        }
    });
    /*try {//Internet Explorer
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
    }
    catch (e) {
        try {//Firefox, Mozilla, Opera, etc.
            xmlDoc = document.implementation.createDocument("", "", null);
        }
        catch (e) {
            alert(e.message)
        }
    }
    try {
        xmlDoc.async = false;
        xmlDoc.load(filename);
    }
    catch (e) {
        alert(e.message)
    }*/
    return (xmlDoc);
}