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("/index.html");
</script>
第四种:
<script language="JavaScript">
self.location='http://www.codefans.net';
</script>
第五种:
<script language="javascript">
alert("非法访问!");
top.location='http://www.baidu.com';
</script>