body {
    margin: 10px 50px 50px 50px;
}

#load-btn-hidden {
  height: 0px;
  visibility: hidden;
  position: absolute;
}

#canvas-div {
    height: 600px;
    width: 540px;
    overflow-y: auto;
    background: #eeeeee;
}

#indicator {
    width: 100%;
    height: 100%;
    z-index: 9999;
    position: fixed;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.0);
    filter: alpha(opacity=65);
    -moz-opacity: 0.65;
    -khtml-opacity: 0.65;
    opacity: 0.5;
    background-image: url('../image/indicator.gif');
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    display: none;
}