function Showlayer(thislayer) {
	if (document.getElementById) {
		document.getElementById(thislayer).style.visibility = 'visible';
	}
	else if (document.all) {
		document.all.thislayer.style.visibility = 'visible';
	}
	else if (document.layers) {
		eval('document.' + thislayer + '.visibility="show"');
	}
}
function Hidelayer(thislayer) {
	if (document.getElementById) {
		document.getElementById(thislayer).style.visibility = 'hidden';
	}
	else if (document.all) {
		document.all.thislayer.style.visibility = 'hidden';
	}
	else if (document.layers) {
		eval('document.' + thislayer + '.visibility="hide"');
	}
}