// -- CONTACTO
//*********************************************************
function contacto(contactoweb){
	contactoweb = 'contacto.php';
	coordenada_x = (screen.width) ? (screen.width- 480)/2 : 0;
	coordenada_y = (screen.height) ? (screen.height- 470)/2 : 0;
	window.open(contactoweb, 'contacta', 'top=' + coordenada_y +',left=' + coordenada_x + ',width=480,height=470,directories=no,menubar=no,location=no,resizable=no,status=no,toolbar=no,scrollbars=no');
}