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>