var hidedelay=250
  var keepvisible = 0;  
  var hidetimerId = "undefined";
  var hideuobj = "undefined";
  
function showitem(elmnt)
{
document.getElementById(elmnt).style.visibility="visible"
}
function hideitem(elmnt)
{
document.getElementById(elmnt).style.visibility="hidden"
}
function potemkinshowitem(elmnt1, elmnt2)
{
  hideitem(elmnt2);
  showitem(elmnt1);
  
 }
function potemkinhideitem(elmnt1, elmnt2)
{
  hideitem(elmnt1);
  showitem(elmnt2)
 }