function add_item(cart_item) {
	AjaxRequest.post({
		'url' : '/cart/ajax/cart_grid',
		'add' : cart_item,
		'onSuccess' : function(req) { 
			document.getElementById('cart_grid_container').innerHTML = req.responseText;
		}
	});
	document.getElementById('item_'+i).style.display = 'none';
}


		function checkout() {
			document.getElementById('total_form').submit();
		}