ajax-circa-2005.js

function sendTestLead() {
    callAjax("servlet/SendTestLead?order_id=165&product_id=1", alert);
}

function callAjax(url, f) {
    var o = new Object();
    o.req = makeXMLHttpRequest();
    o.req.onreadystatechange = function() {
        if(o.req.readyState == 4)
        f(o.req.responseText);
    }
    o.req.open("GET", url, true);
    o.req.send("");
}

function makeXMLHttpRequest() {
    var req;
    // branch for native XMLHttpRequest object
    if(window.XMLHttpRequest) {
        try {
            req = new XMLHttpRequest();
        } catch(e) {
            req = false;
        }
    // branch for IE/Windows ActiveX version
    } else if(window.ActiveXObject) {
        try {
            req = new ActiveXObject("Msxml2.XMLHTTP");
        } catch(e) {
            try {
                req = new ActiveXObject("Microsoft.XMLHTTP");
            } catch(e) {
                req = false;
            }
        }
    }
    return req;
}