#curtLeft {
    z-index: 500;
    position: absolute;
    top: 0; left: 0;
    width: 50%;
    height: 100%;
    background-image: url('../../images/background.gif');
    background-repeat: repeat;
  }
  
  #curtRight {
    z-index: 500;
    position: absolute;
    top: 0; right: 0;
    width: 50%;
    height: 100%;
    background-image: url('../../images/background.gif');
    background-repeat: repeat;
  }