$(function() {

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

  //create new containerImgscroll for images
        $("<div>").attr("id", "containerImgscroll").css({ position:"absolute"}).width($(".wrapper").length * 300).height(140).appendTo("div#viewer");

        //add images to containerImgscroll
        widthDiv = 0;
        $(".wrapper").each(function() {
                $(this).appendTo("div#containerImgscroll");
                widthDiv = widthDiv + $(this).width();
        });
        
        $("div#containerImgscroll").width(widthDiv);

        //work out duration of anim based on number of images (1 second for each image)
        var duration = $(".wrapper").length * 2000;

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

        //set direction
        var direction = "rtl";

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

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

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

                //show controls
                ($("div#controls").length == 0) ? $("<div>").attr("id", "controls").appendTo("div#outercontainerImgscroll").css({ opacity:0.7 }).slideDown("slow") : null ;
                ($("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.wrapper").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($("div#containerImgscroll").width()) + parseInt($("div#viewer").width());

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

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

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

        });

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

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

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

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

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

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

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

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

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

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

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

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

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

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