第一種：

復制代碼 代碼如下:

<script language="javascript" type="text/javascript">
window.location.href="login.jsp?backurl="+window.location.href;
</script>

復制代碼 代碼如下:

<script language="javascript">
alert("返回");
window.history.back(-1);
</script>

復制代碼 代碼如下:

<script language="javascript">
window.navigate("top.jsp");
</script>

復制代碼 代碼如下:

<script language="JavaScript">
self.location='top.htm';
</script>

復制代碼 代碼如下:

<script language="javascript">
alert("非法訪問！");
top.location='xx.jsp';
</script>