function ampliar_01() {
	ven = open("agradecimientos.htm","01_default","width=470,height=310,status=no,toolbar=no,menubar=no,scrollbars=yes");
}
function ampliar_02() {
	ven = open("sobre.htm","01_default","width=470,height=450,status=no,toolbar=no,menubar=no,scrollbars=yes");
}
function fecha(){
	var d=new Date();
	var f = d.getFullYear();
		if (f > 2006) {
			ff = "2006-" + f; 
			return ff;
		} else {
			return f;
		}
}
function cerrar() {
     self.close()
}
function expo() {
	ven = open("expo/expo.htm","exposicion","width=780,height=526,top=0,left=0,screenX=0,screenY=0,status=no,toolbar=no,menubar=no,scrollbars=no,resizable=no");

}