function ampliar_01() {
	ven = open("agradecimientos.htm","01_default","width=470,height=455,status=no,toolbar=no,menubar=no,scrollbars=no");
}

function fecha(){
	var d=new Date();
	var f = d.getFullYear();
		if (f > 2004) {
			ff = "2004-" + f; 
			return ff;
		} else {
			return f;
		}
}

function cerrar() {
     self.close()
}