第一种： <script language="javascript" type="text/javascript"> window.location.href="login.jsp?backurl="+window.location.href; </script>第二种： <script language="javascript"> alert("返回"); window.history.back(-1); </script>第三种： <script language="javascript"> window.navigate("top.jsp"); </script>第四种： <script language="JavaScript"> self.location='top.htm'; </script>第五种： <script language="javascript"> alert("非法访问！"); top.location='xx.jsp'; </script>
