function myFunction(){


        for(var y = 0; y < imageHeight; y++) {
    
          // loop through each column
          for(var x = 0; x < imageWidth; x++) {
              
             var red = data[((imageWidth * y) + x) * 4];
             var green = data[((imageWidth * y) + x) * 4 + 1];
             var blue = data[((imageWidth * y) + x) * 4 + 2];
             var alpha = data[((imageWidth * y) + x) * 4 + 3];
             var pinRed = 4 + ( x * 3 );
             var pinGreen = 3 + ( x *3 );
             var pinBlue = 2 + ( x *3 );
             socket.send( "d"+pinRed+' '+ red +"\r");
             socket.send( "d"+pinGreen+' '+ green +"\r");
             socket.send( "d"+pinBlue+' '+ blue +"\r");
          }
        }
}
        
function initNodeSocket() {
    
          var imageObj = new Image();
      imageObj.onload = function() {
            drawImage(this);
      };
      imageObj.src = '4pixels2.jpg';
	//  Map implementation differences to single reference
	window.WebSocket = window.WebSocket || window.MozWebSocket;		

	//  Instantiate the web socket
	socket = new WebSocket( 'ws://'+ "localhost:8080" );
	//  Attach event handlers
	//  socket.onmessage = onMessageReceived;
}
// Démarrer le lien avec node lorsque la page est chargée.
window.onload = initNodeSocket;