anchor.diff:  	  	</div>
   		<div class="panel-body">
   			<p><video id="video" autoplay="autoplay" class="img-thumbnail"></video></p>
  -			<p><input type="button" id="buttonSnap" value="Prendre une photo" disabled="disabled" onclick="snapshot()" /></p>
   			<p>
  -			<input type="button" id="buttonStart" value="Démarrer" disabled="disabled" onclick="start()" />
  -			<input type="button" id="buttonStop" value="Arrêter" disabled="disabled" onclick="stop()" />
  +				<button type="button" id="buttonSnap" value="Prendre une photo" class="btn btn-info" disabled="disabled" onclick="snapshot()">
  +					<span class="glyphicon glyphicon-camera"></span></button>
  +				<button type="button" id="buttonStart" class="btn btn-default" value="Démarrer" disabled="disabled" onclick="start()">
  +					démarrer
  +				</button>
  +				<button type="button" id="buttonStop"  class="btn btn-danger" value="Arrêter" disabled="disabled" onclick="stop()">
  +					<span class="glyphicon glyphicon-remove-circle"></span>
  +				</button>
   			</p>
   			<p><canvas id="canvas" class="img-thumbnail"></canvas></p>
   		</div>
  
positive.code: 
  function stop()
  {
  	var myButton = document.getElementById('buttonStop');
  	if (myButton) myButton.disabled = true;
  	myButton = document.getElementById('buttonSnap');
  	if (myButton) myButton.disabled = true;
  	if (videoStream)
  	{
  		if (videoStream.stop) videoStream.stop();
  
negative.code: 	}
  	else if (window.URL) video.src = window.URL.createObjectURL(stream);
  	else video.src = stream;
  	buttonState(snapButton, false);
  	buttonState(stopButton, false);
  }
  
  function start()
  