(function($) {                                          // Compliant with jquery.noConflict()
$.fn.jCarouselLite = function(o) {
  o = $.extend({
    btnPrev: null,
    btnNext: null,
    btnGo: null,
    mouseWheel: false,
    auto: null,

    speed: 200,
    easing: null,

    vertical: false,
    circular: true,
    visible: 3,
    start: 0,
    scroll: 1,
    pauseOnHover: true,

    beforeStart: null,
    afterEnd: null
  }, o || {});

  return this.each(function() {                           // Returns the element collection. Chainable.

    var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
    var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible, paused=0;

    if(o.circular) {
      ul.prepend(tLi.slice(tl-v-1+1).clone())
        .append(tLi.slice(0,v).clone());
      o.start += v;
    }

    // Set pause flag
    o.pauseOnHover ? ul.hover(function (){paused=1}, function (){paused=0}) : "";

    var li = $("li", ul), itemLength = li.size(), curr = o.start;
    div.css("visibility", "visible");

    li.css({overflow: "hidden", 'float': o.vertical ? "none" : "left"});
    ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});
    div.css({overflow: "hidden", position: "relative", "z-index": "2", left: "0px"});

    var liSize = o.vertical ? height(li) : width(li);   // Full li size(incl margin)-Used for animation
    var ulSize = liSize * itemLength;                   // size of full ul(total length, not just for the visible items)
    var divSize = liSize * v;                           // size of entire div(total length for just the visible items)

    li.css({width: li.width(), height: li.height()});
    ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

    div.css(sizeCss, divSize+"px");                     // Width of the DIV. length of visible images

    if(o.btnPrev)
      $(o.btnPrev).click(function() {
        return go(curr-o.scroll);
      });

    if(o.btnNext)
      $(o.btnNext).click(function() {
        return go(curr+o.scroll);
      });

    if(o.btnGo)
      $.each(o.btnGo, function(i, val) {
        $(val).click(function() {
          return go(o.circular ? o.visible+i : i);
        });
      });

    if(o.mouseWheel && div.mousewheel)
      div.mousewheel(function(e, d) {
        return d>0 ? go(curr-o.scroll) : go(curr+o.scroll);
      });

    if(o.auto)
      setInterval(function() {
        go(curr+o.scroll);
      }, o.auto+o.speed);

    function vis() {
      return li.slice(curr).slice(0,v);
    };

    function go(to) {
      if(!running && !paused) {

        if(o.beforeStart)
          o.beforeStart.call(this, vis());

        if(o.circular) {            // If circular we are in first or last, then goto the other end
          if(to<=o.start-v-1) {           // If first, then goto last
            ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");
            // If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements.
            curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;
          } else if(to>=itemLength-v+1) { // If last, then goto first
            ul.css(animCss, -( (v) * liSize ) + "px" );
            // If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements.
            curr = to==itemLength-v+1 ? v+1 : v+o.scroll;
          } else curr = to;
        } else {                    // If non-circular and to points to first or last, we just return.
          if(to<0 || to>itemLength-v) return;
          else curr = to;
        }                           // If neither overrides it, the curr will still be "to" and we can proceed.

        running = true;

        ul.animate(
          animCss == "left" ? { left: -(curr*liSize) } : { top: -(curr*liSize) } , o.speed, o.easing,
          function() {
            if(o.afterEnd)
              o.afterEnd.call(this, vis());
            running = false;
          }
        );
        // Disable buttons when the carousel reaches the last/first, and enable when not
        if(!o.circular) {
          $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
          $( (curr-o.scroll<0 && o.btnPrev)
            ||
             (curr+o.scroll > itemLength-v && o.btnNext)
            ||
             []
           ).addClass("disabled");
        }

      }
      return false;
    };
  });
};

function css(el, prop) {
  return parseInt($.css(el[0], prop)) || 0;
};
function width(el) {
  return  el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
};
function height(el) {
  return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
};

})(jQuery);