total_price = 0;
total_count = 0;
privilege_race = 0.2;
var old_color = '';
force_color = '#FEFCD6';
change_color = '#FEFCD6';
default_color = '#FFFFFF';
window.onload = function() {
	total_price = 0;
	total_count = 0;
	privilege_race = 0.2;
	old_color = '';
	force_color = '#FEFCD6';
	change_color = '#FEFCD6';
	default_color = '#FFFFFF';
	document.forms['BuyNow'].reset();
	document.getElementById('TotalPrice').innerHTML = '0.00';
	document.getElementById('PriceDescription').innerHTML = ' ';
}
function addProduct(obj_name, obj_id, obj_price)
{
	if (obj_name.checked == true)
	{
		total_price += obj_price;
		total_count += 1;
		parent_obj = obj_name.parentNode.parentNode;
		for ( var i = 0; i < parent_obj.childNodes.length; i++) parent_obj.childNodes[i].bgColor = force_color;
		old_color = force_color;
	}
	else
	{
		total_price -= obj_price;
		total_count -= 1;
		old_color = default_color;
	}
	if (total_price != 0)
	{
		if (1 < total_count)
		{
			total_price_real = total_price * (1 - privilege_race);
			price_description = privilege_race * 100 + '% discount; you save US$ ' + total_price * privilege_race / 100;
		}
		else
		{
			total_price_real = total_price;
			price_description = '&nbsp;';
		}
		document.getElementById('TotalPrice').innerHTML = total_price_real / 100;
		document.getElementById('PriceDescription').innerHTML = price_description;
	}
	else document.getElementById('TotalPrice').innerHTML = '0.00';
}
function goToBuyPage()
{
	elements = document.forms['BuyNow'].elements;
	selected_id = '';
	selected_num = 0;
	for (var i = 0; i < elements.length; i++)
	{
		if (elements[i].type == 'checkbox' && elements[i].checked == true)
		{
			selected_id += ',16514-' + elements[i].value;
			selected_num += 1;
		}
	}
//	document.getElementById('BtnBuyNow').disabled = true;
//	if (selected_num > 0) location.href='https://www.regnow.com/softsell/nph-softsell.cgi?items=' + selected_id.substr(1) + '&ss_cart_reset=true' + ((selected_num > 1) ? '&ss_coupon=CHEN-00D1-MUTI' : '');
	if (selected_num > 0) location.href='https://www.regnow.com/softsell/nph-softsell.cgi?items=' + selected_id.substr(1) + '&ss_short_order=true&ss_cart_reset=true' + ((selected_num > 1) ? '&ss_coupon=CHEN-00D1-MUTI' : '');
	else
	{
		alert('You must select at least one product');
		document.getElementById('BtnBuyNow').disabled = false;
	}
}
function changeBackgroundColor(obj_name)
{
	for ( var i = 0; i < obj_name.childNodes.length; i++)
	{
		old_color = obj_name.childNodes[i].bgColor;
		if (!old_color) old_color = '#FFFFFF';
		obj_name.childNodes[i].bgColor = change_color;
	}
}
function restoreBackgroundColor(obj_name)
{
	for ( var i = 0; i < obj_name.childNodes.length; i++) obj_name.childNodes[i].bgColor = old_color;
}