function Iniciar_FireAd() {
	document.getElementById('oscuro').style.display='block';
	document.getElementById('firefox_alerta').style.display='block';
	var name = "fire_ad";
	var value = "fire_ad";
	var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";

}

function Cerrar_FireAd() {
	document.getElementById('oscuro').style.display='none';
	document.getElementById('firefox_alerta').style.display='none';
}