if(typeof(Offbeat) == 'undefined')
	var Offbeat = {};
Offbeat.Cart = Class.create();

Object.extend(Offbeat.Cart.prototype, {	
	initialize: function(url) {
		this.url = url;
	},
	
	removeItem: function(id) {
		new Ajax.Request(this.url + 'action/removeCartItem/', {
			parameters: { cartitem: id },
			onSuccess: function(transport) {
				$('cart-item_' + id).remove();
				$('total').update(transport.responseText);
			}
		});
	},
	
	changeQuantity: function(id, quantity) {
		new Ajax.Request(this.url + 'action/updateCartItemQuantity/', {
			parameters: { cartitem: id, quantity: quantity },
			onSuccess: function(transport) {
				$('total').update(transport.responseText);
			}
		});
	},
	
	changeType: function(id, type) {
		new Ajax.Request(this.url + 'action/updateCartItemType/', {
			parameters: { cartitem: id, type: type },
			onSuccess: function(transport) {
				$('total').update(transport.responseText);
			}
		});
	},

	next: function(parameters) {
		new Ajax.Updater('callout-panel', this.url + 'checkout/next', {
			evalscripts: true,
			parameters: parameters
		});
	}
});