if (navigator.appName.indexOf("Netscape") != -1){
  if (window.innerHeight == screen.height) fact = 100; else fact = 50;
  tp = window.innerHeight-fact;
  }
else {
  if (screen.availHeight == screen.height) fact = 220; else  fact = 185;
  tp = screen.availHeight - fact;
}

if (screen.height > 760) {

 document.write('<div id="navbar" style="position:absolute; left:10px; top:' + tp + 'px">');
 document.write('<hr>[ <a href="Javascript:history.back()">Back <\/a> | ');
 document.write(' <a target="_top" href="index.htm">Wirral Index<\/a> | ');
 document.write('<a target="_top" href="../index.htm">Main Homepage<\/a> ]<\/div>');
}