function addToCart(btn, productID) {
    var quantity = $(btn).prev().val();
    if (quantity.length == 0 || parseFloat(quantity) == 0) quantity = 1;

    $(btn).prev().val('');

    var url = baseURL + 'Project/Views/Shared/Handlers/OrderHandler.ashx';
    $("#shoppingcart").load(url, { action: 'Add', productID: productID, quantity: quantity });
}
function removeFromCart(orderLineID) {
    var url = baseURL + 'Project/Views/Shared/Handlers/OrderHandler.ashx';
    $("#shoppingcart").load(url, { action: 'Remove', orderLineID: orderLineID });
}
function showShoppingCart() {
    if ($("#shoppingcart").length == 0) return;
    var url = baseURL + 'Project/Views/Shared/Handlers/OrderHandler.ashx';
    $("#shoppingcart").load(url, { action: 'Show'});
}