function isNetscape(v) {
  return isBrowser("Netscape", v);
  }

function isMicrosoft(v) {
  return isBrowser("Microsoft", v);
  }

function isBrowser(b,v) {
  browserOk = false;
  versionOk = false;

  browserOk = (navigator.appName.indexOf(b) != -1);
  if (v == 0) versionOk = true;
  else  versionOk = (v <= parseInt(navigator.appVersion));
  return browserOk && versionOk;
  }

if (isNetscape(4)) {
   document.write('<IMG SRC="/fade.png" id="fade">');
}

document.write('<DIV id="copy" class="copy">Original content Copyright &#169; 2008 D. Brockbank</DIV>');