js实现页面跳转的几种方式

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>