function changemaps(opt) {
	if( opt == 'ofi') {
		document.getElementById('ofi').style.display = "block";
		document.getElementById('rene').style.display = "none";
	} else if ( opt == 'rene') {
		document.getElementById('rene').style.display = "block";
		document.getElementById('ofi').style.display = "none";
	}
}