$(function() {

	//remove js-disabled class
	$("#viewer").removeClass("js-disabled");

	//create new container for images
	$("<div>").attr("id", "container").css({ position:"absolute"}).width($(".wrapperlink").length * 170).height(170).appendTo("div#viewer");

	//add images to container
	$(".wrapperlink").each(function() {
		$(this).appendTo("div#container");
	});

	//work out duration of anim based on number of images (1.5 second for each image)
	var duration = $(".wrapperlink").length * 1750;

	//store speed for later (distance / time)
	var speed = (parseInt($("div#container").width()) + parseInt($("div#viewer").width())) / duration;

	//set direction
	var direction = "rtl";

	//set initial position and class based on direction
	(direction == "rtl") ? $("div#container").css("left", $("div#viewer").width()).addClass("rtl") : $("div#container").css("left", 0 - $("div#container").width()).addClass("ltr") ;

	//animator function
	var animator = function(el, time, dir) {

		//which direction to scroll
		if(dir == "rtl") {

			//add direction class
			el.removeClass("ltr").addClass("rtl");

			//animate the el
			el.animate({ left:"-" + el.width() + "px" }, time, "linear", function() {

				//reset container position
				$(this).css({ left:$("div#imageScroller").width(), right:"" });

				//restart animation
				animator($(this), duration, "rtl");

				//hide controls if visible
				($("div#controls").length > 0) ? $("div#controls").slideUp("slow").remove() : null ;

			});
		} else {

			//add direction class
			el.removeClass("rtl").addClass("ltr");

			//animate the el
			el.animate({ left:$("div#viewer").width() + "px" }, time, "linear", function() {

				//reset container position
				$(this).css({ left:0 - $("div#container").width() });

				//restart animation
				animator($(this), duration, "ltr");

				//hide controls if visible
				($("div#controls").length > 0) ? $("div#controls").slideUp("slow").remove() : null ;
			});
		}
	}

	//start anim
	animator($("div#container"), duration, direction);

	//pause on mouseover
	$("a.wrapperlink").live("mouseover", function() {

		//stop anim
		$("div#container").stop(true);

		//show controls
		($("div#controls").length == 0) ? $("<div>").attr("id", "controls").appendTo("div#outerContainer").css({ opacity:0.7 }).slideDown("slow") : null ;
		($("a#rtl").length == 0) ? $("<a>").attr({ id:"rtl", href:"javascript:void(0)", title:"rtl" }).appendTo("#controls") : null ;
		($("a#ltr").length == 0) ? $("<a>").attr({ id:"ltr", href:"javascript:void(0)", title:"ltr" }).appendTo("#controls") : null ;

		//variable to hold trigger element
		var title = $(this).attr("title");

		//add p if doesn't exist, update it if it does
		($("p#title").length == 0) ? $("<p>").attr("id", "title").text(title).appendTo("div#controls") : $("p#title").text(title) ;
	});

	//restart on mouseout
	$("a.wrapperlink").live("mouseout", function(e) {

		//hide controls if not hovering on them
		(e.relatedTarget == null) ? null : (e.relatedTarget.id != "controls") ? $("div#controls").slideUp("slow").remove() : null ;

		//work out total travel distance
		var totalDistance = parseInt($("div#container").width()) + parseInt($("div#viewer").width());

		//work out distance left to travel
		var distanceLeft = ($("div#container").hasClass("ltr")) ? totalDistance - (parseInt($("div#container").css("left")) + parseInt($("div#container").width())) : totalDistance - (parseInt($("div#viewer").width()) - (parseInt($("div#container").css("left")))) ;

		//new duration is distance left / speed)
		var newDuration = distanceLeft / speed;

		//restart anim
		animator($("div#container"), newDuration, $("div#container").attr("class"));

	});

	//handler for ltr button
	$("#ltr").live("click", function() {

		//stop anim
		$("div#container").stop(true);

		//swap class names
		$("div#container").removeClass("rtl").addClass("ltr");

		//work out total travel distance
		var totalDistance = parseInt($("div#container").width()) + parseInt($("div#viewer").width());

		//work out remaining distance
		var distanceLeft = totalDistance - (parseInt($("div#container").css("left")) + parseInt($("div#container").width()));

		//new duration is distance left / speed)
		var newDuration = distanceLeft / speed;

		//restart anim
		animator($("div#container"), newDuration, "ltr");
	});

	//handler for rtl button
	$("#rtl").live("click", function() {

		//stop anim
		$("div#container").stop(true);

		//swap class names
		$("div#container").removeClass("ltr").addClass("rtl");

		//work out total travel distance
		var totalDistance = parseInt($("div#container").width()) + parseInt($("div#viewer").width());

		//work out remaining distance
		var distanceLeft = totalDistance - (parseInt($("div#viewer").width()) - (parseInt($("div#container").css("left"))));

		//new duration is distance left / speed)
		var newDuration = distanceLeft / speed;

		//restart anim
		animator($("div#container"), newDuration, "rtl");
	});
});