function validate_tshirts()
{
	error = "";
	f = document.vecart_add;
	if (
		f.vecartOption_Style.value == "Women's fitted"
		&&
			(
				f.vecartOption_Size.value == "XL"
				||
				f.vecartOption_Size.value == "XXL"
			)
	) {
		error = "Women's fitted t-shirts are only available in S, M and L";		
	} else if (
		f.vecartOption_Style.value == "Regular"
		&&
			(
				f.vecartOption_Size.value == "S"
				||
				f.vecartOption_Size.value == "M"
			)
	) {
		error = "S and M regular t-shirts are sold out, sorry! We only have large and XL left.";		
	}			
	if (error != "")
	{
		alert(error);
		return false;
	}
	else
	{
		return true;
	}
}