function toggle(thisObject) 
{	
	var object = document.getElementById(thisObject);
	
	if (object.style.display != "none")
	{
		object.style.display = 'none';
		object.style.visibility = 'hidden';
	}
	else
	{
		object.style.display = '';
		object.style.visibility = '';
	}
}

function updatePrice(price, theCheckbox)
{
	var priceBox = document.getElementById("price");
	var currentPrice = parseFloat(priceBox.innerHTML);
	var checkbox = document.getElementById(theCheckbox);

	priceBox.innerHTML = '';

	if (checkbox.checked == true)
	{
		priceBox.innerHTML = currentPrice + price;
	}
	else
	{
		priceBox.innerHTML = currentPrice - price;
	}	
}