รบกวนช่วยดู การส่งข้อมูล ชื่อไฟล์แบบ POST หน่อยค่ะ

<form action="repair.php" method="post" enctype="multipart/form-data" name="form1" id="form1">
  <p>File: 
    <input type="file" name="filUpload">
  </p>
  
  <p>
    <input type="submit" name="Submit" value="Enter" />
  </p>
</form>

<input type="file" name="filUpload">
        <input type="button" onClick="showHidePreloader(true); makePostRequest('fromtestload.php?filUpload="filUpload"&name="name"', 'post_filUpload=post_"filUpload"&post_name="name"', 'showContent')" value="Send POST request" />

<?php

$Filename = $_FILES['filUpload']['name'];

echo $Filename;