加载js无阻塞模式

javascript知识点

function loadScript(url, callback) {
    var script = document.createElement("script");
    script.type = "text/javascript";
    if (script.readyState) {//IE
        script.onreadystatechange = function () {
            if (script.readyState == "loaded" || script.readyState == "complete") {
                script.onreadystatechange = null;
                callback();
            }
        }
    } else {
        script.onload = function () {
            callback();
        }
    }
    script.src = url;
    document.getElementsByTagName("head")[0].appendChild(script);
}

loadScript("test.js",function(){
    Application.init();
})