function pageReady() {
    localVideo = document.getElementById('localVideo');
    remoteVideo = document.getElementById('remoteVideo');

    serverConnection = new WebSocket('ws://127.0.0.1:3434');
    serverConnection.onmessage = gotMessageFromServer;

    var constraints = {
        video: true,
        audio: true,
    };

    if(navigator.getUserMedia) {
        navigator.getUserMedia(constraints, getUserMediaSuccess, getUserMediaError);
    } else {
        alert('Your browser does not support getUserMedia API');
    }
}