modernizr-test_position_fixed_ios.js

/* modernizr-test_position_fixed_ios.js
* Original by Daniel Ott (https://gist.github.com/1333800)
* 3 March 2011
* Updated by Philipp Söhnlein 3 November 2011
* Custom Tests using Modernizr's addTest API
*/

/* iOS
* There may be times when we need a quick way to reference whether iOS is in play or not.
* While a primative means, will be helpful for that.
*/
Modernizr.addTest('ipad', function () {
  return !!navigator.userAgent.match(/iPad/i);
});

Modernizr.addTest('iphone', function () {
  return !!navigator.userAgent.match(/iPhone/i);
});

Modernizr.addTest('ipod', function () {
  return !!navigator.userAgent.match(/iPod/i);
});

Modernizr.addTest('appleios', function () {
  return (Modernizr.ipad || Modernizr.ipod || Modernizr.iphone);
});

/* CSS position:fixed
* Not supported in older IE browsers, nor on Apple's iOS devices.
* Actually the token example on the Modernizr docs. http://www.modernizr.com/docs/
*/
Modernizr.addTest('positionfixed', function () {
  /* Uh-oh. iOS < 5 would return a false positive here.
  * If it's about to return true, we'll explicitly test for known iOS User Agent strings.
  * "UA Sniffing is bad practice" you say. Agreeable, but sadly this feature has made it to
  * Modernizr's list of undectables, so we're reduced to having to use this. */
  navigator.userAgent.match(/OS (\d)/i);
  if (Modernizr.appleios && RegExp.$1 < 5) {
  	return false;
  }
  
  var test = document.createElement('div'),
  control = test.cloneNode(false),
  fake = false,
  root = document.body || (function () {
  fake = true;
    return document.documentElement.appendChild(document.createElement('body'));
  }());
   
  var oldCssText = root.style.cssText;
  root.style.cssText = 'padding:0;margin:0';
  test.style.cssText = 'position:fixed;top:42px';
  root.appendChild(test);
  root.appendChild(control);
  var ret = test.offsetTop !== control.offsetTop;
   
  root.removeChild(test);
  root.removeChild(control);
  root.style.cssText = oldCssText;
  if (fake) {
    document.documentElement.removeChild(root);
  }
  
  return ret;
});

This is great! One problem is that, like iOS <5, Android 2.3.2 and below have the same issue. How would I also detect for these browsers?