Redirect page Jump --- js achieve several ways

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Redirect page Jump --- js achieve several ways

    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");   //不支持firefox
    </script>

    第四种：
    <script language="JavaScript">
        self.location='top.htm';
    </script>

    第五种：
    <script language="JavaScript ">         top.location = 'xx.jsp';
        Alert (" unauthorized access "!);

    </script>

Reproduced in: https: //my.oschina.net/usenrong/blog/197854