/*
 * the normal style sheet link having an ID atrtibute, NS4 will ignore it.
 *
 *
 */
 
if(!(is_nav && is_major <= 4))
{
  var i=0;
  
  while(i<document.styleSheets.length &&
        document.styleSheets[i].href != "http://cmpg.unibe.ch/biologystyle-netscape4.css")
    i++;
  
  if (i<document.styleSheets.length)
    document.styleSheets[i].disabled = true;
}