Update ไม่เข้า แต่เอา statement ใช้ใน MySql ได้คับ

<?PHP
header("Content-type: text/html; charset=tis620");
require_once('global.inc.php'); 
date_default_timezone_set('Asia/Bangkok');
?>

<?PHP 
$user = $_POST["txt_user"];
$pass = $_POST["txt_pass"];
$new = $_POST["txt_new"];

	$strSQL = "UPDATE login SET user_pass = '".$new."' WHERE userid = '".$user."' and user_pass = '".$pass."' ";
	$objQuery = mysql_query($strSQL);
if($objQuery)
{
	//echo $strSQL;
	echo "<script language=\"JavaScript\">";
	echo "alert('แก้ไขข้อมูลเรียบร้อย');";
	echo "</script>";
	echo "<script>window.close();</script>";
}
else
{
	echo "Error Save [".$strSQL."]";
	echo "<script language=\"JavaScript\">";
	echo "alert('ข้อมูลไม่ถูกต้อง');";
	echo "</script>";
	//echo "<script>window.location.href='change_pass.php';</script>";
}

mysql_close($conn);
?>