function show (toshow) {
	if(document.getElementById(toshow).style.visibility == 'visible'){
		document.getElementById(toshow).style.visibility = 'hidden';
		document.getElementById(toshow).style.display = 'none';
	} else {
		document.getElementById(toshow).style.visibility = 'visible';
		document.getElementById(toshow).style.display = 'block';
	}
}