$(function () {
    var buyLink = "https://www.paypal.com/cgi-bin/webscr";
    $('.buy-tap-link').click(function () {
        $('form#aspnetForm').attr('action', buyLink);
    });

    var buyBottleLink = "https://www.paypal.com/cgi-bin/webscr";
    $('.paypal-buy-bottle').click(function () {
        $('form#aspnetForm').attr('action', buyBottleLink);
    });
});