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>