jQuery干扰标题（位置）

Question

在我的索引上，我有一个jQuery脚本将文件加载到我的包装器div中。但是如果我将submit2.php加载到div中并且文件中有标题（位置），它会将页面重定向到div。但是，我希望整个页面重定向为_self <a>链接。

任何方式绕过这个或我做错的事情干扰它？

用于将文件加载到div中的jQuery脚本：

<script>
  $(document).ready(function() {
    var trigger = $('#nav ul li a'), container = $('#wrapper');
    trigger.on('click', function() {
      var $this = $(this), target = $this.data('target');
      container.load(target + '.php');
      return false;
    });
  });
</script>

submit2.php

<?php
  session_start();
  include('config.php');
  $con = mysqli_connect($dbhost,$dbuser,$dbpass,$dbname);
  $error = "";
  if (empty($_POST['username']) || empty($_POST['pass'])) {
    $error = "Both fields are required.";
  } else {
    $loginpass = md5($_POST['pass']);
    $user = $_POST['username'];
    $sql="SELECT * FROM user WHERE username='$user'";
    $result=mysqli_query($con,$sql);
    $checkuser=mysqli_num_rows($result);
    if($checkuser!=1) {
      $error = "username doesn't exist in our database!";
    }
    while($row=mysqli_fetch_array($result)) {
      $checkpass = $row['password'];
      $user_id = $row['id'];
      $level = $row['usergroup'];
      if ($loginpass == $checkpass) {
        $_SESSION['login_user'] = $user;
        $_SESSION['user_id'] = $user_id;
        $_SESSION['start'] = time();
        $_SESSION['user_level'] = $level;
        echo ("succesfully logging in");
        header("Location: panel/index.php");
    } else {
        $error = "Incorrect Password!";
    }
  }
}

感谢。