jquery.loader.js

(function(j,q,u,e,r,y){if(typeof(jQuery)=='undefined'){(q=j.createElement(q)).type='text/javascript';if(r){q.async=true;}q.src='//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js';u=j.getElementsByTagName(u)[0];q.onload=q.onreadystatechange=(function(){if(!e&&(!this.readyState||this.readyState=='loaded'||this.readyState=='complete')){e=true;y();q.onload=q.onreadystatechange=null;u.removeChild(q);}});u.appendChild(q);}else{y();}})(document,'script','head',false,false,(function(){$(function(){
    /* code goes here */
});}));


// readable:
(function (j, q, u, e, r, y) {
    if (typeof(jQuery) == 'undefined') {
        (q = j.createElement(q)).type = 'text/javascript';
        if (r) { q.async = true; }
        // dont need http|https - /1/ means latest 1.x version
        q.src = '//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js';
        u = j.getElementsByTagName(u)[0];
        // onload event for callback
        q.onload = q.onreadystatechange = (function () {
            // first fire when completely loaded and parsed & check if this happened before
            if (!e && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete')) {
                e = true;
                // execute your jquery code now
                y();
                // IE memory leak protection
                q.onload = q.onreadystatechange = null;
                u.removeChild(q);
            }
        });
        u.appendChild(q);
    }
    else {
        // looks like jquery is already loaded - just execute code right away
        y();
    }
//                                    async   callback
})(document, 'script', 'head', false, false, (function () {
    $(function(){
        /* code goes here */
    });
}));