curr = 1;

function slide(n,d) {
	$("#showcase-navigation-button-"+curr).removeClass("active");
	curr = n;
	if (!d) { d = 1000; }
	newPos = 160 - ((curr-1) * $("#showcase-slide"+curr).height());
	$("#showcase-navigation-button-"+curr).addClass("active");
	$("#showcase").animate({
		top: newPos,
	}, { queue: false, duration: d, easing: "easeOutQuint" } );
}

function nextSlide() {
	if (curr < totalRows) {
		slide(curr+1);
	} else {
		slide(1);
	}
}

function prevSlide() {
	if (curr > 1) {
		slide(curr-1);
	}
}