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

        speed: 200,
        easing: null,

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

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

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

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

        var liSize = o.vertical ? height(li) : width(li);   
        var ulSize = liSize * itemLength;                   
        var divSize = liSize * v;                           

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

        div.css(sizeCss, divSize+"px");                    

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

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

        if(o.btnGo)
            $.each(o.btnGo, function(i, val) {
                $(val).click(function() {
                    return go((o.circular ? o.visible+i : i),'go',(o.circular ? o.visible+i : i));
                });
            });
			
		if(o.btnStop){
			$(o.btnStop).mouseover(function(){
				running=true;
			});
		}
		if(o.btnStart){
            $(o.btnStop).mouseout(function(){
                running=false;
            });
		}
        if(o.auto){
            	interval=setInterval(function() {go((curr+o.scroll),'next',o.scroll);}, o.auto+o.speed);
		}

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

        function go(to,op,val) {
            if(!running) {
				
                if(o.beforeStart){
					o.beforeStart.call(this, vis());
				}

                if(o.circular) {            
                    if(to<=o.start-v-1) {           
                        ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");
                        
                        curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;
                    } else if(to>=itemLength-v+1) { 
                        ul.css(animCss, -( (v) * liSize ) + "px" );
                       
                        curr = to==itemLength-v+1 ? v+1 : v+o.scroll;
                    } else curr = to;
                } else {                    
                    if(to<0 || to>itemLength-v) return;
                    else curr = to;
                }       
				
                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;
                    }
                );
				
				if(running){
					if(animCss=='left'){
						try{
						eval(o.functionClick+"(op,val);");
						}catch(e){}
					}
					
				}
                
                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);