javascript create javascript script file

script 脚本用法

	<script type="text/javascript">
		(function (d) {
		var ta=d.createElement("script");ta.type="text/javascript";ta.async=true;ta.id="tb-beacon";
		ta.setAttribute("exparams","category=&userid=&tid=8091075f35e4e484f9f215c8d4f100d0&channel=112&at_alitrackid=www%2etaobao%2ecom&");
		ta.src=("https:"==d.location.protocol?"https://s":"http://a")+".tbcdn.cn/s/atp.js";
		d.getElementsByTagName("head")[0].appendChild(ta);
		})(document);
		</script>




	function ietruebody() {
	  return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body;
	}