防止跨域方式调用JS文件&分步加载JS

防止跨域方式调用JS

<script type="text/javascript">

document.domain = "aaa.com";

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

};

// 调用

// bitLoadScript("http://aaa.com/ssss.ashx", null, "utf-8");

// bitLoadScript("http://aaa.com/ssss.js?v=3.0", null, "utf-8");

//     重复调用
bitLoadScript("http://aaa.com/201001/usercars.js",
function(){
viewedcars();
bitLoadScript("http://aaa.com/201001/usercarlife.js",function(){bitLoadScript("http://aaa.com/bitautoforum/userforum.js",usercarlife ,"utf-8");},"utf-8");},"utf-8");

</script>