getUserMedia

http://www.html5rocks.com/de/tutorials/getusermedia/intro/

by Denise Nepraunig

JavaScript

function hasGetUserMedia() {
  // Note: Opera builds are unprefixed.
  return !!(navigator.getUserMedia || navigator.webkitGetUserMedia ||
            navigator.mozGetUserMedia || navigator.msGetUserMedia);
}

if (hasGetUserMedia()) {
  // Good to go!
} else {
  alert('getUserMedia() is not supported in your browser');
}