复制代码 代码如下:

(function (clover) {

clover.loadScript = function loadScript(url, callback) {

var heads = document.getElementsByTagName('head');

if (heads.length == 0) {

alert("page must have one head element");

}

var head = heads[0];

var script = document.createElement('script');

script.type = 'text/javascript';

script.src = url;

// most browsers

script.onload = callback;

// IE 6 & 7

script.onreadystatechange = function () {

if (this.readyState == 'complete') {

callback();

}

}

head.appendChild(script);

}

})(window.clover = window.clover || {});

// sample

// clover.loadScript("http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js");