var timerID;
function ShowLayer(id,delay)
{
  document.getElementById(id).style.display = "block"; 
  timedLayer(id,delay)
}
function HideTimedLayer(id)
{  
    clearTimeout(timerID);
    document.getElementById(id).style.display = "none";
}
function timedLayer(id,delay)
{
delay=delay*1000;
  setTimeout("HideTimedLayer(\"" + id + "\")", delay);
}