Javascript的异常捕捉

    <script language="javascript" type="text/javascript">
        function TestException()
        {
            try
            {
                throw new Error("any Exception");
            }
            catch(ex)
            {
                alert(ex.number+"\n"+ex.description);
            }
            finally
            {
                alert("end");
            }
        }
    </script>