function resaltar(){
	var imgs = $$('#maincontent img');
	/*var imgs=document.getElementsByTagName('div');*/
	var i = 0;
	for (i = 0; i < imgs.length; i++) {
		imgs[i].fade({
			from: 0,
			to: 1,
			duration: 2.0
		});
		
	}
	setTimeout('visible()',500);
	
}
function visible () {
	var imgs = $$('#maincontent img');
	for (i=0; i<imgs.length;i++) {
		imgs[i].setStyle({
			'visibility':'visible'
		});
	}
}

function cambiarPestana(elto) {
	elto.setStyle({
			'background-image': 'url("../images/pestana_activa.png !important")'
		});
		alert ("mono");
}