Load jQuery 1.11.2 asynchronously, e.g. for IE8 in Rendera

loadScript_jQuery-1.11.2.js

// @link http://blog.kevinchisholm.com/asynchronous-javascript/cross-browser-asynchronous-javascript-script-loading/

function loadScript(url,callback){
    if(!url || !(typeof url === 'string')){return};
    var script = document.createElement('script');
    //if this is IE8 and below, handle onload differently
    if(typeof document.attachEvent === "object"){
        script.onreadystatechange = function(){
            //once the script is loaded, run the callback
            if (script.readyState === 'loaded'){
                if (callback){callback()};
            };
        };  
    } else {
        //this is not IE8 and below, so we can actually use onload
        script.onload = function(){
            //once the script is loaded, run the callback
            if (callback){callback()};
        };
    };
    //create the script and add it to the DOM
    script.src = url;
    document.getElementsByTagName('head')[0].appendChild(script);
};

loadScript('//code.jquery.com/jquery-1.11.2.min.js', function(){
  // code here
});