/////////////////
for($j=1;$j<=$Q;$j++)
{
////////ตรวจสอบค่า////////
$sql="SELECT p_price*".$_GET["txtName$j"]." AS SUM FROM product where (p_id='".$_GET["select$j"]."')";
$query=mysql_query($sql) or die ("Error Query [".$sql."]");
$num_row[$j]=mysql_fetch_array($query);
$SUM=$num_row[$j]["SUM"];
// $_GET["txtName$j"];
// $sum=$_GET["txtName$j"]*$num_row["p_price$j"];
$total=$total+$SUM;
}
///////////// ?>