(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,

        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+1).clone())
              .append(tli.slice(0,v).clone());
            o.start += v;
        }

        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({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) {

                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);