function slider(){
	this.count = 1;
	this.offSet = 0;
}
slider.prototype.slide = function(idCont,action,pos,visible,scrolling){
		// id bottoni nomi bottomi
		var idPrev = 'b-prev'+pos;
		var idNext = 'b-next'+pos;		
		// off set spostamento
		var scrollVal = scrolling;
		// numero di elementi per pagina
		var ElxPage = visible;
		// numero totale elementi
		var totalEl = $('#'+idCont+' li').size();
		/*
		incrementa il counter e sposta l'offSet
		viene eseguita solo se riceve il parametro action
		*/
		if(action != ''){
			page = Math.ceil(totalEl / ElxPage);
			if(action == 'prev' && this.count > 1){
				this.count--;
				this.offSet += scrollVal;
			}
			if(action == 'next' && this.count != page){
				this.count++;
				this.offSet -= scrollVal;					
			}
			$('#'+idCont).animate({left: this.offSet},1000);
		}
		// controlli pulsantiera
		if(this.count == 1 || page > 1){
			$('#'+idPrev).attr({src: "/v006/img/fr-gib-off.gif"});
			$('#'+idNext).attr({src: "/v006/img/fr-gab.gif"});	
			$('#l-prev'+pos).css({'cursor':'default'});	
			$('#l-next'+pos).css({'cursor':'pointer'});
		}
		if(this.count > 1 && this.count == page){
			$('#'+idNext).attr({src: "/v006/img/fr-gab-off.gif"});	
			$('#l-next'+pos).css({'cursor':'default'});			
		}		
		if(this.count > 1){
			$('#'+idPrev).attr({src: "/v006/img/fr-gib.gif"});
			$('#l-prev'+pos).css({'cursor':'pointer'});	
		}
		if((totalEl < ElxPage) || (totalEl == ElxPage)){
			$('#'+idNext).attr({src: "/v006/img/fr-gab-off.gif"});
			$('#'+idPrev).attr({src: "/v006/img/fr-gib-off.gif"});
			$('#l-next'+pos+',#l-prev'+pos).css({'cursor':'default'});
		}

}