function addItem(productID, quantity)
{
	// Send request.
	$.ajax(
	{
		url: 'ajax/addItem.asp', 
		type: 'POST', 
		data: 
		{
			itemId: productID, 
			qty: quantity
		}, 
		dataType: 'html', 
		success: function(html)
		{
			showMessageBox(html);
			updateCartSummary();
		}
	});
}