function hitung_subtotal() {
	var harga = document.edit.harga.value;
	var item_discount_amount = document.edit.item_discount_amount.value;
	var item_quantity = document.edit.item_quantity.value;
	var subtotal_lama = document.edit.subtotal_lama.value;
	var subtotal_transaksi = document.edit.subtotal_transaksi.value;
	subtotal_transaksi = ( harga - item_discount_amount) * item_quantity;
	document.edit.subtotal_transaksi.value = Math.floor( subtotal_transaksi );
	var pengurangan_total = document.edit.pengurangan_total.value;
	pengurangan_total = subtotal_transaksi - subtotal_lama;
	document.edit.pengurangan_total.value = Math.floor( pengurangan_total );
}



	echo "			<h1 align=\"right\">{$locationdata['loc_name']}</h1>\n";
	echo "			<h3 align=\"right\">{$userdata['fullname']}</h3>\n";
	echo "			<h3 align=\"right\"><a href=\"".URL."/index.php?page=logout\"><b>| KELUAR |</b> </a></h3>\n";
	
	echo "				<div class=\"copy\">2015 - ".date("Y")." | Powered by: PinusNusaMedia</div>\n";

	

item_code
item_name
harga
item_discount_amount
item_quantity
subtotal_transaksi