body, html {
    width: 800px;
    height: 600px;
    overflow: auto;
}

.container {
    position: relative;
    width: 640px;
    height: 480px;
    margin: 0 auto;
}

.container img {
    width: 100%;
    height: 100%;
}

#startstopButton {
    position: absolute;
    top: 254px;
    left: 36px;
    width: 164px;
    height: 73px;
    background-image: url('images/startbutton2.jpg');
    border: none;
}