function setBlockVisibility(id, show)
{
	if (show == true)
	{
		var elem = document.getElementById(id);
		if (elem != null)
		{
			elem.style.display = "block";
		}
	}
	else
	{
		var elem = document.getElementById(id);
		if (elem != null)
		{
			elem.style.display = "none";
		}
	}
}