<!--
	var qty = 0;
	var title = "";

	function item_check(box){
		if (box.checked){
			qty++;
			title += box.value;
		}else{
			qty--;
			title = title.replace(box.value, "");
		}
		update_order();
	}
	
	function update_order(){
		var total_cost;
		switch(qty){
			case 1:
				total_cost = 100;
				break;
			case 2:
				total_cost = 150;
				break;
			case 3:
			 	total_cost = 225;
			 	break;
			case 4:
			 	total_cost = 300;
			 	break;
			default:
				total_cost = 0;
				break;
		}
		document.getElementById("amount").value = total_cost;
		document.getElementById("item_name").value = title;
	}
	
	function check_form(){
		if (qty < 1){
			alert("Please select the DVDs you'd like to buy, then press this button.");
			return false;
		}else{
			return true;
		}
	}
-->