#overlay{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.8);
    z-index: 2;
    width: 100%;
    height:100%; 
    text-align: center;
    padding:5%;
}
#overlay img{
    display:inline-block;
    height: 80%;
    width:auto;
}

/*spinner loading animation credit goes to  http://tobiasahlin.com/spinkit/ */
.spinner {
    margin: 200px auto;
    width: 50px;
    height: 40px;
    text-align: center;
    font-size: 10px;
  }
  
  .spinner > div {
    background-color: #AA8439;
    height: 100%;
    width: 6px;
    display: inline-block;
    margin: 0 3px 0 0;
    
    -webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
    animation: sk-stretchdelay 1.2s infinite ease-in-out;
  }
  
  .spinner .rect2 {
    -webkit-animation-delay: -1.1s;
    animation-delay: -1.1s;
  }
  
  .spinner .rect3 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
  }
  
  .spinner .rect4 {
    -webkit-animation-delay: -0.9s;
    animation-delay: -0.9s;
  }
  
  .spinner .rect5 {
    -webkit-animation-delay: -0.8s;
    animation-delay: -0.8s;
  }
  
  @-webkit-keyframes sk-stretchdelay {
    0%, 40%, 100% { -webkit-transform: scaleY(0.4) }  
    20% { -webkit-transform: scaleY(1.0) }
  }
  
  @keyframes sk-stretchdelay {
    0%, 40%, 100% { 
      transform: scaleY(0.4);
      -webkit-transform: scaleY(0.4);
    }  20% { 
      transform: scaleY(1.0);
      -webkit-transform: scaleY(1.0);
    }
  }