function contact(addr)
{
	var domain = 'raplica.com';
	location.href = 'mailto:'+addr+'@'+domain;
}

function validateAddToCart()
{
	var size = document.getElementById('size').value;
	var qty = document.getElementById('qty').value;
	
	if ( size != '' )
	{
		var maxQty = document.getElementById('maxqty-' + size).value;
		
		if ( qty != '' && qty > 0 )
		{
			if ( maxQty == -1 || qty <= maxQty )
			{
				return true;
			}
			else
			{
				alert("Sorry, we don't have that many shirts in stock.");
				return false;
			}
		}
		else
		{
			alert('You need to enter a quantity.');
			return false;
		}
	}
	else
	{
		alert('Select a size, please.');
		return false;
	}
}

function changeShirt(img, text)
{
	document.getElementById('shirtImage').src = img;
	document.getElementById('shirtImageText').innerHTML = text;
}

function validateCalcShipping()
{
	if ( document.getElementById('country').value == 'us' && document.getElementById('zip').value == '' )
	{
		alert('I need a Zip Code!');
		return false;
	}
	else
	{
		return true;
	}
}

function updateZip()
{
	if ( document.getElementById('country').value != 'us' )
	{
		document.getElementById('zip').disabled = true;
	}
	else
	{
		document.getElementById('zip').disabled = false;
	}
}

function updateMaxQty()
{
	var html = '';
	var maxQty = -1;
	var size = document.getElementById('size').value;
	
	if ( size != '' )
	{
		maxQty = document.getElementById('maxqty-' + size).value;
	}
	
	if ( maxQty != -1 )
	{
		html = '(' + maxQty + ' in stock)';
	}
	
	document.getElementById('maxqty').innerHTML = html;
}