iphone-ipad-detect-version.js

<script type="text/javascript">
  var appVer        = navigator.appVersion;
  var searchVersion = /\s(\d)_\d/;
  var searchDevice  = /\s[(](\w+\s?\w*)[;]\s/;
  var isIPhone      = false;
  var isIPad        = false;
  if (searchVersion.exec(appVer) && searchDevice.exec(appVer)){
    var deviceVersion = searchVersion.exec(appVer)[1];
    if ("iPhone"           == searchDevice.exec(appVer)[1]){ isIPhone = deviceVersion; }
    if ("iPhone Simulator" == searchDevice.exec(appVer)[1]){ isIPhone = deviceVersion; }
    if ("iPad"             == searchDevice.exec(appVer)[1]){ isIPad   = deviceVersion; }
  }
  if(isIPad){   alert("iPad Version: "   + isIPad  ); }
  if(isIPhone){ alert("iPhone Version: " + isIPhone); }
</script>

This should detect if you have an iPad or iPhone and store the version number in either the isIPhone or isIPad variable.

You can see an example of this script here: http://jordandobson.com/_expirements/iphone-ipad/version_detect.html

NOTE: If you don't use an iPhone or iPad to load the page you won't get an alert.