รบกวน ช่วยเชคโค้ดให้หน่อยค่ะ อัพโหลดไฟล์ไม่ได้ค่ะ แต่มันสามารถอัพเดท ฟิลด์ได้แล้วนะค่ะ

<?
//Edit Record
if ($_GET["action"]=="edit_update"){
	//Select Data 
	$sql="SELECT * FROM tb_asset WHERE  as_id='$_GET[as_id]' "; 
	//echo "Select Data : $sql";
	$query=mysql_query($sql)or die (mysql_error());
	while($result=mysql_fetch_assoc($query)){
?>
<div id="content">
<span class="tl"><span class="tr"></span></span> 
<form action="" method="post" name="editRecord" target="_parent" enctype="multipart/form-data" id="editRecord">
	<div class="addrecord">
        <ul>        	
     <li style="text-indent:120px; width:1200px; text-align:left; line-height:40px;">
<?
/*Edit files Only */
if($result[files]!=""){
?>
	<li style="text-indent:120px; width:1200px; text-align:left; line-height:40px;"><?=$result['files'];?>
    <a href="<?=$PHP_SELF?>?action=edit_files&as_id=<?= $result['as_id'];?> "><img src="../images/edit-icon.png"/></a> |
    <a href="<?=$_SERVER['PHP_SELF']?>?action=delete_files&as_id=<?=$result['as_id'];?>" onclick="return confirm('Are you sure you want to delete?')"><img src="../images/remove-icon.png"/></a
    ></li>
<?
}else{
?>
	<div>files</div><input name="files_txt" type="file" Value=""  />
<? }
	}//while
 ?>
   </li>
          <li style="margin-left:115px;"><input name="btnAdd" type="submit" value="Update" /></li>   
   </div>
 </form>
<?
$file = strtolower($_FILES["files_txt"]["name"]);
$sizefile = $_FILES["files_txt"]["size"]; 
$type= strrchr($file,".");

if($sizefile>5242880){ // Not Over 5 Mb
	echo "<script>alert('$sizefile/1024')</script>";
}elseif(($type==".jpg")||($type==".jpeg")||($type==".gif")||($type==".png")||($type==".pdf")||($type==".tif")||($type==".tiff")){
	//$tempfile = date("Y-m-d")."-".$file;
move_uploaded_file($_FILES["files_txt"]["tmp_name"]."../files_del/".$_FILES["files_txt"]["name"]); 
	/*echo "<script>alert('$tempfile')</script>";*/
 if(isset($_POST['date_txt'])!=""){ 
 $objsql="UPDATE tb_asset SET files ='".$_FILES["files_txt"]["name"]."' WHERE as_id='$_GET[as_id]' "; 
 $objquery=mysql_query($objsql) or die (mysql_error());
	echo "Update :"."$objsql";
	if($objquery){
	echo"Updated.";
			header("location:index.php");
	  exit(0);  
	  }
	}else{
		echo"Not Update ";
	}
}else{
	/*echo "<script>alert('".$_FILES['files_txt']['name']."');</script>";*/
}
 ?>
 <span class="bl"><span class="br"></span></span> 
</div>
<?
}//End Edit&Update
?>