function ChangeQuantity(x)
    {
        document.combo3.itemquantity.value = x.options[x.selectedIndex].value;
		
			switch(document.combo3.itemquantity.value ){
				case "1":
					document.combo3.amount.value='23.65';
					document.combo3.item_number.value='COMBO-003x1';
					document.combo3.item_name.value='1 x Year of Paul Audio Combo Pack #3';
					break;
				case "20":
					document.combo3.amount.value='400';
					document.combo3.item_number.value='COMBO-003x20';
					document.combo3.item_name.value='20 x Year of Paul Audio Combo Pack #3';
					break;
				case "50":
					document.combo3.amount.value='1000';
					document.combo3.item_number.value='COMBO-003x50';
					document.combo3.item_name.value='50 x Year of Paul Audio Combo Pack #3';
					break;
				case "100":
					document.combo3.amount.value='2000';
					document.combo3.item_number.value='COMBO-003x100';
					document.combo3.item_name.value='100 x Year of Paul Audio Combo Pack #3';
					break;
				case "200":
					document.combo3.amount.value='4000';
					document.combo3.item_number.value='COMBO-003x200';
					document.combo3.item_name.value='200 x Year of Paul Audio Combo Pack #3';
					break;
			}
    }