DOM = (document.getElementById)
NS4 = (document.layers)

function show(obj) {
	if (NS4) {
		eval('document.' + obj + '.visibility = "show"');
	}
	if (DOM) {
		eval('document.getElementById(' + 'obj' + ').style.visibility = "visible"');
	}
}

function hide(obj) {
	if (NS4) {
		eval('document.' + obj + '.visibility = "hide"');
	}
	if (DOM) {
		eval('document.getElementById(' + 'obj' + ').style.visibility = "hidden"');
	}
}