$(document).ready(function() {
	var images = $("#gallery img");
	var thumbs = $("#thumbs img");
	var index = thumbs.length-1;
	var thumbsHeight = 129;
	thumbs.slice(thumbs.length-3,thumbs.length).clone().prependTo("#thumbs");
	for (i=0; i<thumbs.length; i++) {
		$(thumbs[i]).addClass("thumb-"+i);
		$(images[i]).addClass("image-"+i);
	}
	show(index);
	setInterval(sift, 7000);
	function sift() {
		if ( index < thumbs.length && index > 0) {
			index -= 1 ;
		}
		else { 
			index = thumbs.length-1;
		}

		show (index);
	}
	function show(num) {
		images.fadeOut(400);
		$(".image-"+num).stop().fadeIn(400);
		var scrollPos = ( (num-1) * thumbsHeight ) + 129;
		$("#thumbs").stop().animate({scrollTop: scrollPos}, 400);
	}
});