// swapLogo() - to swap the SiG-Logo
//  ---------------------------------------------------------------------------
function swapLogo(imageName,isOver) {
  if (document.images) {
//    alert ("swapLogo("+imageName+","+isOver+")");
    if (isOver) {
      document[imageName].src ="images/LogoButton_on.gif"; 
//      alert ("swapLogo (false): "+document[imageName].src);
    }	else {
      document[imageName].src ="images/LogoButton_off.gif";
//      alert ("swapLogo (false): "+document[imageName].src);
    }
  }
//  tmpImage = document.images[imageName];
//  tmpImage.src = ;
}