#loading-mask {
    display: none;
    position: fixed;
    text-align: center;
    z-index: 500;
    top: 50%;
    left: 50%;
}

#loading-mask-content {
  border: 2px solid #CCCCCC;
  left: 50%;
  margin-left: -60px;
  padding: 30px 30px;
  position: fixed;
  text-align: center;
  top: 45%;
  width: 300px;
  z-index: 1000;
  background: #fff none repeat scroll 0 0;
}

#loading-mask-content button {
  margin: 15px 0 0;
}