ต้องการส่งข้อมูลรูปภาพ เพื่อไปเก็บใน path ที่กำหนดไว้ คือ Folder Myfiles แต่รูปไม่เก็บลง path

<script type="text/javascript">
function save(){
	var data;
	var subtract_list="";
	var subtract_flag;
	var reject_comment="";
	var sub_percentSUM = 0;
	

	
	data="weightNo=" + document.getElementById("txtWeightReceiptNo").value;
	data+="&pwd=" + document.getElementById("txtpwd").value; 
	data+="&subtract_list=" + subtract_list;
	data+="&sub_percentSUM=" + sub_percentSUM;
	data+="&subtract_flag=" +  subtract_flag;
	data+="&reject_comment=" + reject_comment;
	data+="&subtract_money=" + subtract_money;
        data+="&files=" + document.getElementById("files").files[0].name; 

	
	ajaxLoad('post','sql_insert.php',data,'');
	
	return false;
	
}
</script>

<input type="file" name="files" id="files"/>

<?php header("Content-Type:text/javascript; charset=utf-8");
require_once("condb.php");

$weightNo = iconv('utf-8','windows-874',$_POST['weightNo']);  
$subtract_list = iconv('utf-8','windows-874',$_POST['subtract_list']);   
$subtract_flag = iconv('utf-8','windows-874',$_POST['subtract_flag']);  
$reject_comment = iconv('utf-8','windows-874',$_POST['reject_comment']);   
$subtract_money = iconv('utf-8','windows-874',$_POST['subtract_money']);   
$sub_percentSUM = iconv('utf-8','windows-874',$_POST['sub_percentSUM']); 
$files = iconv('utf-8','windows-874',$_POST['files']);


	    if ($_FILES["files"]["error"] > 0) {
        echo "Error: " . $_FILES["files"]["error"] . "<br />";
    } else {
        move_uploaded_file($_FILES["files"]["tmp_name"],"myfile/" . $_FILES["files"]["name"]);

        // Get fileURL path and show success alert
        global $fileURL;
        $fileURL = "myfile/" . $_FILES["files"]["name"];
		$file= $_FILES["files"]["name"];

       	$sql="insert into i_scales_TQCS_H values('".$weightNo."','".date('Y-m-d')."','".date('H:i')."','".$member_id."','".$member_name."','".$subtract_status."','".$sub_service1_Flag."','".$sub_service2_Flag."','".$sub_percentSUM."',NULL, '".$file."') ;";

  }
?>