(function (global, doc, handler) {
    var head = doc.head || doc.getElementsByTagName("head");
    var consts = (function (consts) {
        consts.jqurl = "//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js";
        return consts;
    })({});

    function OnLoaded() {
        global.$ = global.jQuery;
    }

    // loading code borrowed directly from LABjs itself
    setTimeout(function () {
        if("item" in head) { // check if ref is still a live node list
            if(!head[0]) { // append_to node not yet ready
                setTimeout(arguments.callee, 25);
                return;
            }
            head = head[0]; // reassign from live node list ref to pure node ref -- avoids nasty IE bug where changes to DOM invalidate live node lists
        }
        var scriptElem = doc.createElement("script"),
            scriptdone = false;
        scriptElem.onload = scriptElem.onreadystatechange = function () {
            if((scriptElem.readyState && scriptElem.readyState !== "complete" && scriptElem.readyState !== "loaded") || scriptdone) {
                return false;
            }
            scriptElem.onload = scriptElem.onreadystatechange = null;
            scriptdone = true;
            return OnLoaded();
        };
        scriptElem.src = consts.jqurl;
        head.insertBefore(scriptElem, head.firstChild);
    }, 0);

    // required: shim for FF <= 3.5 not having document.readyState
    if(doc.readyState == null && doc.addEventListener) {
        doc.readyState = "loading";
        doc.addEventListener("DOMContentLoaded", handler = function () {
            doc.removeEventListener("DOMContentLoaded", handler, false);
            doc.readyState = "complete";
        }, false);
    }
})(window, document);