function addToCart ( page , model , mid )
{
	var quantity = window.prompt('Adding ' + model + ' to cart. Please, enter the desired quantity:', '0');

	window.location.href = page + 'action=add_to_cart&phone=' + mid + '&quantity=' + quantity;
}

function removeFromCart ( page , model , mid )
{
	var quantity = window.prompt('Removing ' + model + ' from cart. Please, enter the desired remaining quantity:', '0');

	window.location.href = page + 'action=remove_from_cart&phone=' + mid + '&quantity=' + quantity;
}