create js 

<script type="text/javascript">
        (function (d, s, id) {
            var js, fjs = d.getElementsByTagName(s)[0];
            if (d.getElementById(id)) return;
            js = d.createElement(s);
            js.id = id;
            js.src = "src";
            js.type = 'text/javascript'; 
            js.async = true;
            fjs.parentNode.insertBefore(js, fjs);
        }(document, 'script', 'Js'));
</script>
posted @ 2012-05-15 13:30  wkylin  阅读(675)  评论(0)  编辑  收藏  举报