Active = "";

function show(which) {
	if (which != "") {
		if (document.layers && document.layers[which]) {
			eval("document.layers['" + which + "'].visibility = 'show';");
		}
		else {
			document.getElementById(which).style.visibility = 'visible';
		}
		if (Active != which) {
		hide(Active);
		Active = which;
		}
	}
}

function hide(which) {
	if (which != "") {
		if (document.layers && document.layers[which]) {
			eval("document.layers['" + which + "'].visibility = 'hide';");
		}
		else {
			document.getElementById(which).style.visibility = 'hidden';
		}
	}
}