var currentRollover = false;

    
function rollOn(obj)
{        
  rollOff();        
  currentRollover = obj;
  
  if(currentRollover != null)
  {           
    if(currentRollover.className == "pressed")
      currentRollover = false;
    else
      currentRollover.className = "rollover";    
  }
  else
    currentRollover = false;
}

function rollOff()
{  
  if (currentRollover != false) 
  {
    currentRollover.className = "menuTop";
    currentRollover = false;
  }       
}