js get android version

getAndroidVersion.js

// http://stackoverflow.com/questions/7184573/pick-up-the-android-version-in-the-browser-by-javascript
function getAndroidVersion(ua) {
    ua = (ua || navigator.userAgent).toLowerCase(); 
    var match = ua.match(/android\s([0-9\.]*)/);
    return match ? match[1] : false;
};

getAndroidVersion(); //"4.2.1"
parseInt(getAndroidVersion(), 10); //4
parseFloat(getAndroidVersion()); //4.2