动态创建script标签

var script = $('<script src="....."></script>');   //创建script标签
$('body').append(script);   //将标签插入body尾部

var head = document.getElementsByTagName('head')[0]; var script = document.createElement('script'); script.type = 'text/javascript'; script.src = 'a.js'; head.appendChild(script);

var s = document.createElement("SCRIPT");
s.type = "text/javascript";
s.innerHTML = "your code";
document.getElemnetsByTagName("HEAD")[0].appendChild(s);

window.onload = function()
{
var scpt = document.createElement("SCRIPT");
scpt.type = "text/javascript";
scpt.src = "en.js";
document.getElemnetsByTagName("HEAD")[0].appendChild(scpt);
//使用延时处理
setTimeout(function(){
   alert(syslang["en"].a);//  -->保证时时有；
},1).
}

var script = document.createElement("script");    script.src = "//url.com/jquery.js";var s = document.getElementsByTagName("script")[0];s.parentNode.insertBefore(script, s);

var script=$('<script>alert("I am a script element")<\/script>');$('body').append(script);
注意那个转义符号，这个是关键