这个页面涉及了很多的JS文件: <script language="javascript" type="text/javascript" src="source/script_cookie.js"></script> <script language="javascript" type="text/javascript" src="source/script_common.js"></script> <script language="javascript" type="text/javascript" src="source/script_menu.js"></script> <script language="javascript" type="text/javascript" src="source/script_ajax.js"></script> <script language="javascript" type="text/javascript" src="source/script_face.js"></script> <script language="javascript" type="text/javascript" src="source/script_manage.js"></script> <script type="text/javascript" src="http://counter.youkuaiyun.com/a/js/AreaCounter.js"></script> <script src="http://hi.images.youkuaiyun.com/js/public/jquery-1.2.3.pack.js" type="text/javascript"></script> 页面下面引用了另外一个JS: <script type="text/javascript" src="http://book.youkuaiyun.com/hi/Bookselfout.ashx?username=userName" ></script> script_cookie.js中定义了一个对象Cookie,里面有各种方法: get用于创建cookie,传入的是一个字符key。