function showmenu(menuitem, urlRedirect)
{
	if (!$(menuitem).visible())
	{	
		Element.show(menuitem);
		window.location = urlRedirect;
	}
	else
	{
		Element.hide(menuitem);
	}
}

var priceList = new Object();
var fixedPrice = 0;

function product_quantity_change()
{
	calcPrice();
}

function initProduct(fixed, varPrice)
{
	fixedPrice = fixed;
	priceList['var'] = varPrice;
	calcPrice();
}

function priceChange(group, price)
{
	priceList[group] = price;
	calcPrice();
}

function calcPrice()
{
	var total = 0;
	
	quantityElem = document.getElementById('quantity');
	sqM = quantityElem.options[quantityElem.selectedIndex].text;

	sizeElem = document.getElementById('specific_size');
	sizeString = sizeElem.options[sizeElem.selectedIndex].text;
	var dims = sizeString.split('x');
	
	quantity = (sqM * 100 * 100) / (dims[0] * dims[1]);

	for (name in priceList)
	{
		total += priceList[name];
	}
	
	total *= quantity;
	total += fixedPrice;

	priceElem = document.getElementById('price');
	priceElem.innerHTML = Math.round(total * 100) / 100;
}