(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,
        startID: null,
        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();
        var curr = o.start; 
        div.css("visibility", "visible");
        
        // So we can target based on ID, not the order of the element
        if(o.startID){
            $("li", ul).each(function(i){ 
                var id = $(this).attr('id');
                if(id == o.startID){
                    curr = Math.floor(i / o.scroll) * o.scroll; 
                    $(this).addClass('active');
                    return false; // Stop the loop b/c we found what we were looking for
                }
            });  
        }
        
        //li.css({overflow: "hidden", float: o.vertical ? "none" : "left"}); 
        /* Modified by Brian Litzinger. Safari crapped out on a parse error on the line above */
        li.css('overflow', "hidden");
        li.css('float', "left");
        /* end mod */   
        
        ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});
        div.css({overflow: "hidden", position: "relative", "z-index": "2"});

        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: 'auto'});
        ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

        div.css(sizeCss, divSize+"px");                     // Width of the DIV. length of visible images
        
        // Disable buttons on load
        if(!o.circular) {
            if(curr - o.scroll > itemLength || curr == 0 && o.btnPrev){
                $(o.btnPrev).addClass("disabled");
            }
            if(curr + o.scroll >= itemLength && o.btnNext){
                $(o.btnNext).addClass("disabled");
            }
        }  

        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 = 0;
                    if(to < 0 || to >= itemLength) return false;
                    else curr = to;
                }                           // If neither overrides it, the curr will still be "to" and we can proceed.

                running = true;
            
                ul.animate({left: -(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");
                    if(curr - o.scroll > itemLength || curr == 0 && o.btnPrev){
                        $(o.btnPrev).addClass("disabled");
                    }
                    if(curr + o.scroll >= itemLength && o.btnNext){
                        $(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);