<!--
//var lastLayer
//	lastLayer ="img0"
 
function showLayer( layerName ) {
	if ( document.layers ) {
		document.layers["img"].document.layers[layerName].visibility ="show";
	}
	else {
		if ( document.all ) {
			document.all[layerName].style.visibility ="visible";
		}
		else {
			document.getElementById(layerName).style.visibility ="visible";
		}
	}
	lastLayer = layerName
}
 
function hideLayer( layerName ) {
	if ( document.layers ) {
		document.layers["img"].document.layers[layerName].visibility ="hidden";
	}	else {
		if ( document.all ) {
			document.all[layerName].style.visibility ="hidden";
		}
		else {
			document.getElementById(layerName).style.visibility ="hidden";
		}
	}
}
 
// -->