function ClickButton(buttonID, e)
{
  if (e)  //firefox etc.
  {
    if(e.keyCode==13)
    {
      document.getElementById(buttonID).click();
      e.cancelBubble = true;
      e.returnValue = false;
      return false
    }
  }
  else if (window.event)  //IE etc.
  {
    if(window.event.keyCode==13)
    { 
      document.getElementById(buttonID).click();
      window.event.cancelBubble = true;
      window.event.returnValue = false;
      return false
    }
  }
  return true; 
}