(function($){
    $.fn.jMyCarousel=function(o){
        o=$.extend({
            btnPrev:null,
            btnNext:null,
            mouseWheel:true,
            auto:false,
            speed:500,
            easing:'linear',
            vertical:false,
            circular:true,
            visible:'4',
            start:0,
            scroll:1,
            step:50,
            eltByElt:false,
            evtStart:'mouseover',
            evtStop:'mouseout',
            beforeStart:null,
            afterEnd:null
        },o||{});
        return this.each(function(){
            var running=false,animCss=o.vertical?"top":"left",sizeCss=o.vertical?"height":"width";
            var div=$(this),ul=$("ul",div),tLi=$("li",ul),tl=tLi.size(),v=o.visible;
            var mousewheelN=0;
            var defaultBtn=(o.btnNext===null&&o.btnPrev===null)?true:false;
            var cssU=(v.toString().indexOf("%")!=-1?'%':(v.toString().indexOf("px")!=-1)?'px':'el');
            var direction=null;
            if(o.circular){
                var imgSet=tLi.clone();
                ul.prepend(imgSet).append(imgSet.clone());
            }
            var li=$("li",ul);
            div.css("visibility","visible");
            li.css("overflow","hidden").css("float",o.vertical?"none":"left").children().css("overflow","hidden");
            if(!o.vertical){
                li.css("display","inline");
            }
            if(li.children().get(0).tagName.toLowerCase()=='a'&&!o.vertical){
                li.children().css('float','left');
            }
            if(o.vertical&&jQuery.browser.msie){
                li.css('line-height','4px').children().css('margin-bottom','-4px');
            }
            ul.css("margin","0").css("padding","0").css("position","relative").css("list-style-type","none").css("z-index","1");
            div.css("overflow","hidden").css("position","relative").css("z-index","2").css("left","0px");
            var liSize=o.vertical?height(li):width(li);
            var liSizeV=o.vertical?elHeight(li):height(li);
            var curr=o.start;
            var nbAllElts=li.size();
            var ulSize=liSize*nbAllElts;
            var nbElts=tl;
            var eltsSize=nbElts*liSize;
            var allEltsSize=nbAllElts*liSize;
            var step=o.step=='default'?liSize:o.step;
            o.btnPrev=defaultBtn?$('<input type="button" class="'+(o.vertical?'up':'prev')+'" />'):$(o.btnPrev);
            o.btnNext=defaultBtn?$('<input type="button" class="'+(o.vertical?'down':'next')+'" />'):$(o.btnNext);
            var prev=o.btnPrev;
            var next=o.btnNext;
            if(defaultBtn&&o.auto!==true){
                prev.css({
                    'opacity':'0.6'
                });
                next.css({
                    'opacity':'0.6'
                });
                div.prepend(prev);
                div.prepend(next);
                o.btnPrev=prev;
                o.btnNext=next;
            }
            if(o.eltByElt){
                step=liSize;
                if(o.start%liSize!==0){
                    var imgStart=parseInt(o.start/liSize);
                    curr=o.start=(imgStart*liSize);
                }
            }
        if(o.circular){
            o.start+=(liSize*tl);
            curr+=(liSize*tl);
        }
        var divSize,cssSize,cssUnity;
        if(cssU=='%'){
            divSize=0;
            cssSize=parseInt(v);
            cssUnity="%";
        }
        else if(cssU=='px'){
            divSize=parseInt(v);
            cssSize=parseInt(v);
            cssUnity="px";
        }
        else{
            divSize=liSize*parseInt(v);
            cssSize=liSize*parseInt(v);
            cssUnity="px";
        }
        ul.css(sizeCss,ulSize+"px").css(animCss,-(o.start));
            div.css(sizeCss,cssSize+cssUnity);
            if(o.vertical&&cssUnity=='%'){
            var pxsize=((liSize*nbElts)*(parseInt(v)/100));
            div.css(sizeCss,pxsize+'px');
        }
        if(divSize===0){
            divSize=div.width();
        }
        if(o.vertical){
            div.css("width",liSizeV+'px');
            ul.css("width",liSizeV+'px');
            li.css('margin-bottom',(parseInt(li.css('margin-bottom'))*2)+'px');
            li.eq(li.size()-1).css('margin-bottom',li.css('margin-top'));
        }else{
            div.css('height',liSizeV+'px');
            ul.css('height',liSizeV+'px');
        }
        if(cssU=='%'){
            v=divSize/li.width();
            if(v%1!==0){
                v+=1;
            }
            v=parseInt(v);
        }
        var divVSize=div.height();
            if(defaultBtn){
            next.css({
                'z-index':200,
                'position':'absolute'
            });
            prev.css({
                'z-index':200,
                'position':'absolute'
            });
            if(o.vertical){
                prev.css({
                    'width':prev.width(),
                    'height':prev.height(),
                    'top':'0px',
                    'left':parseInt(liSizeV/2)-parseInt(prev.width()/2)+'px'
                    });
                next.css({
                    'width':prev.width(),
                    'height':prev.height(),
                    'top':(divVSize-prev.height())+'px',
                    'left':parseInt(liSizeV/2)-parseInt(prev.width()/2)+'px'
                    });
            }
            else{
                prev.css({
                    'left':'0px',
                    'top':parseInt(liSizeV/2)-parseInt(prev.height()/2)+'px'
                    });
                next.css({
                    'right':'0px',
                    'top':parseInt(liSizeV/2)-parseInt(prev.height()/2)+'px'
                    });
            }
        }
        if(o.btnPrev){
            $(o.btnPrev).bind(o.evtStart,function(){
                if(defaultBtn){
                    o.btnPrev.css('opacity',0.9);
                }
                running=true;
                direction='backward';
                return backward();
            });
            $(o.btnPrev).bind(o.evtStop,function(){
                if(defaultBtn){
                    o.btnPrev.css('opacity',0.6);
                }
                running=false;
                direction=null;
                return stop();
            });
        }
        if(o.btnNext){
            $(o.btnNext).bind(o.evtStart,function(){
                if(defaultBtn){
                    o.btnNext.css('opacity',0.9);
                }
                running=true;
                direction='forward';
                return forward();
            });
            $(o.btnNext).bind(o.evtStop,function(){
                if(defaultBtn){
                    o.btnNext.css('opacity',0.6);
                }
                running=false;
                direction=null;
                return stop();
            });
        }
        if(o.auto===true){
            running=true;
            forward();
        }
        if(o.mouseWheel&&div.mousewheel){
            div.mousewheel(function(e,d){
                if(!o.circular&&(d>0?(curr+divSize<ulSize):(curr>0))||o.circular){
                    mousewheelN+=1;
                    if(running===false){
                        if(d>0){
                            forward(step,true);
                        }
                        else{
                            backward(step,true);
                        }
                        running=true;
                    }
                }
            });
}
function forward(stepsize,once){
    var s=(stepsize?stepsize:step);
    if(running===true&&direction==="backward"){
        return;
    }
    if(!o.circular){
        if(curr+s+(o.vertical?divVSize:divSize)>eltsSize){
            s=eltsSize-(curr+(o.vertical?divVSize:divSize));
        }
    }
ul.animate(animCss=="left"?{
    left:-(curr+s)
    }:{
    top:-(curr+s)
    },o.speed,o.easing,function(){
    curr+=s;
    if(o.circular){
        if(curr+(o.vertical?divVSize:divSize)+liSize>=allEltsSize){
            ul.css(o.vertical?'top':'left',-curr+eltsSize);
            curr-=eltsSize;
        }
    }
if(!once&&running){
    forward();
}
else if(once){
    if(--mousewheelN>0){
        this.forward(step,true);
    }
    else{
        running=false;
        direction=null;
    }
}
});
}
function backward(stepsize,once){
    var s=(stepsize?stepsize:step);
    if(running===true&&direction==="forward"){
        return;
    }
    if(!o.circular){
        if(curr-s<0){
            s=curr-0;
        }
    }
ul.animate(animCss=="left"?{
    left:-(curr-s)
    }:{
    top:-(curr-s)
    },o.speed,o.easing,function(){
    curr-=s;
    if(o.circular){
        if(curr<=liSize){
            ul.css(o.vertical?'top':'left',-(curr+eltsSize));
            curr+=eltsSize;
        }
    }
if(!once&&running){
    backward();
}
else if(once){
    if(--mousewheelN>0){
        backward(step,true);
    }
    else{
        running=false;
        direction=null;
    }
}
});
}
function stop(){
    if(!o.eltByElt){
        ul.stop();
        curr=0-parseInt(ul.css(animCss));
    }
    running=false;
    direction=null;
}
function imgSize(el,dimension){
    if(dimension=='width'){
        return el.find('img').width();
    }
    else{
        return el.find('img').height();
    }
}
function elHeight(el){
    var elImg=el.find('img');
    if(o.vertical){
        return parseInt(el.css('margin-left'))+parseInt(el.css('margin-right'))+parseInt(elImg.width())+parseInt(el.css('border-left-width'))+parseInt(el.css('border-right-width'))+parseInt(el.css('padding-right'))+parseInt(el.css('padding-left'));
    }
    else{
        return parseInt(el.css('margin-top'))+parseInt(el.css('margin-bottom'))+parseInt(elImg.width())+parseInt(el.css('border-top-height'))+parseInt(el.css('border-bottom-height'))+parseInt(el.css('padding-top'))+parseInt(el.css('padding-bottom'));
    }
}
function debug(html){
    $('#debug').html($('#debug').html()+html+"<br/>");
}
});
};

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);