PHP登陆提示信息框代码

出错的提示框

echo "<Script Language=\'Javascript\'>";
   echo "alert(\'提示：用户名密码错误，请重新输入！\');";
   echo "history.go(-1);";
   echo "</Script>";

 

验证通过后

 echo "<script>location.replace(\'manage.php\');</script>";