// Desliza los menus

var valueScroll = "";
function slider(id){
	var el = document.getElementById(id);
	var el2 = el.getElementsByTagName("ul")[0];
	if( !el||!el2 ) return;
	
	/*if( document.all ){
		valueScroll = document.body.scroll;
		document.body.scroll = "no";
	}else{				
		valueScroll = document.body.style.overflow;			
		document.body.style.overflow = "hidden";
	}*/
	
	
	var to = el2.offsetHeight;
	var effect = "quartOut";	
		
	if( el.offsetHeight>0 ){
		to = 0;
		effect = "quartInOut";
	}
	
	var Anim = new Class_Animate();
	Anim.animate({
		element: el,
		style: 'height',
		to: to,
		duration: 800,
		effect: effect,
		callback: function(){
			/*if( document.all ){
				if( valueScroll=="" ) document.body.removeAttribute("scroll");
				else document.body.scroll = valueScroll;						
			}else{										
				document.body.style.overflow = (valueScroll=="") ? null : valueScroll;
			}*/			
		}
	});
	
}