function toggle(obj, cmdid, showtext, hiddentext) {
	var el = document.getElementById(obj);
	var cmd = document.getElementById(cmdid);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
		cmd.innerHTML = hiddentext;
	} else {
		el.style.display = 'block';
		cmd.innerHTML = showtext;
	}
}