var carrousel={
	
	nbSlide:0,
	nbCurrent:1,
	elemCurrent:null,
	elem:null,

   init:function(elem){
        this.nbSlide=elem.find(".slide").length;
		
		//Pagination
		elem.append('<div class="navigation"></div>');
		for (var i=1; i<=this.nbSlide;i++){
			elem.find(".navigation").append("<span>"+i+"</span");
		}
		
		elem.find(".navigation span").click(function(){ carrousel.gotoSlide($(this).text());})
		
		//Initialisation
		this.elem=elem;
		elem.find(".slide").hide();
		elem.find(".slide:first").show();
		this.elemCurrent=elem.find(".slide:first");
		this.elem.find(".navigation span : first").addClass("active");
		
   },
   
   gotoSlide:function(num){
	    if(num==this.nbCurrent){return false;}
        this.elemCurrent.fadeOut();
		this.elem.find("#slide"+num).fadeIn();
		this.elem.find(".navigation span").removeClass("active");
		this.elem.find(".navigation span:eq("+(num-1)+")").addClass("active");
		this.nbCurrent=num;
		this.elemCurrent=this.elem.find("#slide"+num);
   },
   
   next:function(){
       var num = this.nbCurrent+1;
	   if(num >this.nbSlide){
	      num=1;
	   }
	   this.gotoSlide(num);
   },
   
   prev:function(){
       var num = this.nbCuurent-1;
	   if(num<1){
	      num=this.nbSlide;
	   }
	   this.gotoSlide(num);
   },
 
}


$(function(){
    carrousel.init($("#carrousel"));
});