function _scrolla(scrolla, itemWidth, itemStop, leftBtn, rightBtn) {
		this.leftBtn = leftBtn;
		this.rightBtn = rightBtn;
		this.scrolla = scrolla;
		this.itemWidth = itemWidth;
		this.itemStop = itemStop;
		
		this.items = $(scrolla + " li").size();
		this.itemsShow = this.items - 1;
		
		this.checkBtns = function() {
			if(this.items == 0)
				return false;
		
			var ie = ($.browser.msie);	

			if(this.itemsShow  == this.items - 1) {
				if(!ie) $(this.leftBtn).fadeOut(); else $(this.leftBtn).hide();
			}
			else {
				if(!ie) $(this.leftBtn).fadeIn(); else $(this.leftBtn).show();
			}

			if(this.itemsShow == this.itemStop) {
				if(!ie) $(this.rightBtn).fadeOut(); else $(this.rightBtn).hide();
			}
			else {
				if(!ie) $(this.rightBtn).fadeIn(); else $(this.rightBtn).show();
			}
		}
		
		this.scrollLeft = function() {
			if(this.items == 0)
				return false;
				
			if($(this.scrolla).is(":animated"))
				return false;

			if(this.itemsShow + 1 > this.items - 1)
				return false;

			this.itemsShow++;
			var mL = $(this.scrolla).css("marginLeft");

			$(this.scrolla).animate({
				marginLeft: (parseInt(mL) + this.itemWidth) + "px"
			});

			this.checkBtns();
		}
		
		this.scrollRight = function() {
			if(this.items == 0)
				return false;
						
			if($(this.scrolla).is(":animated"))
				return false;

			if(this.itemsShow == this.itemStop)
				return false;

			this.itemsShow--;
			var mL = $(this.scrolla).css("marginLeft");

			$(this.scrolla).animate({
				marginLeft: (parseInt(mL) - this.itemWidth) + "px"
			});

			this.checkBtns();
		}
		
		this.checkBtns();
	}