function loadScript(url, callback){

var script = document.createElement_x("script")

script.type = "text/javascript";

if (script.readyState){ //IE

script.onreadystatechange = function(){

if (script.readyState == "loaded" ||

script.readyState == "complete"){

script.onreadystatechange = null;

callback();

}

};

} else { //Others: Firefox, Safari, Chrome, and Opera

script.onload = function(){

callback();

};

}

script.src = url;

document.body.appendChild(script);

}