function display(id, visible)
{
  if (!visible)
  {
    visible = false;
  }
  
  if (visible == false)
  {
	  status = (document.getElementById(id).style.display == 'none')?'block':'none';
    document.getElementById(id).style.display = status;
  }
  else
  {
    document.getElementById(id).style.display = visible;
  }
}