negate.js

// Switch active card on swipe
$(".cards").hammer().bind("swipe", function(ev) {
  if (ev.direction == "left") {
  	if (!activeCard.is(':first-child')) {
		$('.card.active').removeClass('active').next('.card').addClass('active');
  	}
  }
  else if (ev.direction == "right") {
  	if (!activeCard.is(':last-child')) {
		$('.card.active').removeClass('active').prev('.card').addClass('active');
	}
  }
});