function go2(sel) {
  ix = sel.selectedIndex;
  if (sel.options[ix].value != "none") {
	loc = sel.options[ix].value;
//	alert(loc);
	document.location = loc;
	return false;
  }
  return false;
}
document.writeln('<select name="select1" onChange="return go2(this)">');
document.writeln('<option value="none">Product Menu');
document.writeln('<option value="../catalogue.html">- - - Catalogue Page');
document.writeln('<option value="none">Data collection platforms:');
document.writeln('<option value="../waterlog-h-350-xl/index.html">- - - H-350-XL');
document.writeln('<option value="../waterlog-h-500-xl/index.html">- - - H-500-XL');
document.writeln('<option value="none">Sensors');
document.writeln('<option value="../waterlog-h-310/index.html">- - - H-310');
document.writeln('<option value="../waterlog-dh-21/index.html">- - - DH-21');
document.writeln('<option value="../waterlog-h-350/index.html">- - - H-350');
document.writeln('<option value="../waterlog-h-335/index.html">- - - H-335');
document.writeln('<option value="../waterlog-h-336/index.html">- - - H-336');
document.writeln('<option value="../waterlog-h-350-lite/index.html">- - - H-350-LITE');
document.writeln('<option value="../waterlog-h-330/index.html">- - - H-330');
document.writeln('<option value="../waterlog-h-331/index.html">- - - H-331');
document.writeln('<option value="../waterlog-h-510/index.html">- - - H-510');
document.writeln('<option value="../waterlog-h-340/index.html">- - - H-340');
document.writeln('<option value="../waterlog-h-340-sdi/index.html">- - - H-340-SDI');
document.writeln('<option value="none">Logger and sensor combinations');
document.writeln('<option value="../waterlog-h-350-xl/index.html">- - - H-350-XL');
document.writeln('<option value="../waterlog-h-350/index.html">- - - H-350');
document.writeln('<option value="none">Gas bubbler systems');
document.writeln('<option value="../waterlog-h-355/index.html">- - - H-355');
document.writeln('<option value="none">SDI-12 interfaces');
document.writeln('<option value="../waterlog-sidekick/index.html">- - - Side kicks');
document.writeln('<option value="none">Communications interfaces');
document.writeln('<option value="../waterlog-h-222-se/index.html">- - - H-222-SE');
document.writeln('<option value="../waterlog-h-424-ms/index.html">- - - H-424-MS');
document.writeln('<option value="../waterlog-h-260/index.html">- - - H-260');
document.writeln('<\/select>');