如何使用ajax加载分页

Question

我有此代码分页和此代码用于测验后点击下一步将会话和标题（位置）保存到下一页进行测验。

现在我想在点击输入下一个加载下一页...

后加载没有刷新页面的下一页

<?php
   $cid = (int)$_GET['id'];
   if(!isset($_GET['page'])){
        $page = 1;
      }else{
        $page = (int)$_GET['page'];
      }
      $records_at_page = 1;
      $q = $db->query("SELECT * FROM `questions` WHERE `cat`='".$cid."'");
      $records_count = $q->num_rows;

      $pages_count = (int)ceil($records_count / $records_at_page);

      if(($page > $pages_count) or ($page <= 0)){
         die('No More Pages');
      }
        $start = ($page - 1) * $records_at_page;
        $end = $records_at_page;

        $next = $page + 1;
        $prev = $page - 1;

        $qui = isset($_POST['val']);

      if(isset($_POST['next'])){
        $tst = $_SESSION['val'] = $qui;
        $_SESSION['value'] = ($_SESSION['value']  +  $tst);

      if($next <= $pages_count){
        header('Location: quiz.php?id='.$cid.'&page=' .$next. '');
        }

  if($next > $pages_count){
  echo '<a href="result.php?id='.$cid.'">Result</a>';
  exit;}

    }
         if($records_count != 0){
          $ar  = $db->query("SELECT * FROM `questions` WHERE `cat`='".$cid."' order by `id` desc LIMIT $start,$end");

       while($rowar = $ar->fetch_object()){
         echo"
          <form ation='' method='POST'>
          <div>".$rowar->question."</div>";

           $ans = $db->query("select * from `answer` where `question_id`='".$rowar->id."' order by `id` desc");
           $rowans = $ans->fetch_object();
           echo"
           <div ><input class='rgt' type='radio' name='val' value='".$rowans->val1."'/><p>".$rowans->answ1."</p></div>
            <div><input type='submit' name='next'value='Next'/></div>
          </form>
       ";
       }
       }


   ?>