function elementSetDisplay(elmId, displayMode)
{
	var obj = window.document.getElementById(elmId);
	if(!obj)
	{
		alert("elementSetDisplay > element with ID \""+elmId+"\" unfound");
		return false;
	}

	if(!displayMode)
		obj.style.display = (obj.style.display=="none") ? "" : "none";
	else
		obj.style.display = displayMode;

	return true;
}