function show(id) {
	if (document.getElementById) {
		document.getElementById(id).style.visibility='visible';
	} 
	else if (document.all) {
		document.all[id].style.visibility='visible';
	} 
	else if (document.layers) {
		document.layers[id].display='block';
	}
}
function hide(id) {
	if (document.getElementById) {
		document.getElementById(id).style.visibility='hidden';
	} 
	else if (document.all) {
		document.all[id].style.visibility='hidden';    
	}
	else if (document.layers) {
		document.layers[id].display='none';
	}
}