动态加载js文件

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动态加载js文件

<script type="text/javascript">    
    function loadJs(url,Obj) {
        var obj = Obj||{}, script = document.createElement("script"),fun = function(){
            if (script.readyState) {
                if (/loaded|complete/.test(script.readyState)) {
                    script = script.onreadystatechange = script.onload = null;
                    setTimeout(obj.success, 1);
                }
            }else{
                script = script.onreadystatechange = script.onload = null;
                setTimeout(obj.success, 1);
            }
        };
        script.type = "text/javascript";
        script.charset = obj.charset || "utf-8";
        obj.err && (script.onerror = obj.err);
        obj.success && (script.onload = script.onreadystatechange = fun);
        script.src = url;
        document.getElementsByTagName('HEAD')[0].appendChild(script);
    }
    loadJs("images/jquery-1.4.4.min.js",{charset:"utf-8",err:function(){},success:function(){}});
</script>