$(function() {

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

	// create new sponsor_container for images
	$("<div>").attr("id", "sponsor_container").css({
				position : "absolute"
			}).width($(".scroll_logo").length * 170).height(50)
			.appendTo("div#viewer");

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

	// work out duration of anim based on number of images (1 second for each
	// image)
	var duration = $(".scroll_logo").length * 5000;

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

	// set direction
	var direction = "rtl";

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

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

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

	// start animation
	animator($("div#sponsor_container"), duration, direction);

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

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

		// show controls
		($("div#controls").length == 0) ? $("<div>").attr("id", "controls")
				.appendTo("div#outersponsor_container").css({
							opacity : 0.7
						}).slideDown("slow") : null;
		($("a#rtl").length == 0) ? $("<a>").attr({
					id : "rtl",
					href : "#",
					title : "rtl"
				}).appendTo("#controls") : null;
		($("a#ltr").length == 0) ? $("<a>").attr({
					id : "ltr",
					href : "#",
					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.scroll_logo").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($("div#sponsor_container").width())
				+ parseInt($("div#viewer").width());

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

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

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

	});
});