用javascript读取另一个JS源文件

link.jsvar url = "http://******/**.js";  
document.write('<script type="text/javascript" src="'+url+'"><\/script>');
loadlink_js.html<HTML>
<HEAD>
<script language="JavaScript" src="link.js"></script>
<script language="javascript">
             //..........
</script>
</HEAD>
 <BODY>
 </BODY>
</HTML>