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

      speed: 200,
      easing: null,

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

      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;

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

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

      li.css({ overflow: "hidden", zoom: "1", 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.hoverPause) {
          $(o.btnPrev).hover(function() { stopAuto(); }, function() { startAuto(); });
        }
      }


      if (o.btnNext) {
        $(o.btnNext).click(function() {
          return go(curr + o.scroll);
        });
        if (o.hoverPause) {
          $(o.btnNext).hover(function() { stopAuto(); }, function() { startAuto(); });
        }
      }

      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);
        });

      var autoInterval;

      function startAuto() {
        stopAuto();
        autoInterval = setInterval(function() {
          go(curr + o.scroll);
        }, o.auto + o.speed);
      };

      function stopAuto() {
        clearInterval(autoInterval);
      };

      if (o.auto) {
        if (o.hoverPause) {
          div.hover(function() { stopAuto(); }, function() { startAuto(); });
        }
        startAuto();
      };

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

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

          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 < 0) {           // If before range, then go around
              ul.css(animCss, -((curr + tl) * liSize) + "px");
              curr = to + tl;
            } else if (to > itemLength - v) { // If beyond range, then come around
              ul.css(animCss, -((curr - tl) * liSize) + "px");
              curr = to - tl;
            } 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);