jQuery.fn.hideFlechas = function(){
        var $tam = new String($('#contenidoF').css('height'));
        var $temp = $tam.split('p');
        var $altura = $temp[0];
        if($altura<475){
			$('#down').hide();
			$('#up').hide();
        }
		else{
			$('#down').show();
			$('#up').show();
		}
    }

jQuery(document).ready(function($){
	
	
$('#banner2-right').css({'overflow': 'hidden'});
	
    
$('contenidoF').hideFlechas();
		
	
$('#menu-derecho').css({'overflow': 'hidden', 'height': '480px'});
		var $prev = $('#up2');
		$next = $('#down2');
		
		var $cuantos = $('#menu-derecho li').length;
		if($cuantos<=12){
			$prev.hide();
			$next.hide();
		}
	
		$("#menu-derecho").serialScroll({
			items:'li',
			prev: $prev,
			cycle: false,
			next: $next,
			duration: 200,
			axis:'y',
			easing:'linear',
			step:4,
			onBefore:function( e, elem, $pane, $items, pos ){
				$prev.add($next).show();
				var $elementos = $items.length/2;
				if( pos == 0 )
					$prev.hide();
				else if( pos == $elementos)
					$next.hide();
				$('contenidoF').hideFlechas();
			}
		});
});