$(function() {
      
        //remove js-disabled class
        $("#viewer").removeClass("js-disabled");
      
        //create new container for images
        $("<div>").attr("id", "container").css({ position:"absolute"}).width($(".wrapper").length * 170).height(170).appendTo("div#viewer");
          
        //add images to container
        $(".wrapper").each(function() {
          $(this).appendTo("div#container");
        });
        
        //work out duration of anim based on number of images (1 second for each image)
        var duration = $(".wrapper").length * 5000;
        
        //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.wrapper").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) ? $("<a>").attr({ id:"rtl", href:"#", title:"rtl" }).appendTo("#controls") : null ;
          ($("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($("div#container").width()) + parseInt($("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");
        });
      });