function ChangeImage(imageUrl, imgID)
{
  if ( (navigator.appName == 'Netscape' && navigator.appVersion.substring(0,1) >= 3) || (navigator.userAgent.indexOf('MSIE') != -1 && navigator.appVersion.substring(0,1) >= 4) )
		{
				document.images[imgID].src = imageUrl;
		}
}