function ElementVisibility(id, show) {
	if(typeof id == 'string')
	  var e = document.getElementById(id);
  else if(id && id.style)
    var e = id;
  else
    return;
	if(e && e.style) {
		e.style.visibility = show ? 'visible' : 'hidden';
		e.style.display = show ? '' : 'none';
	}
}