ansform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -1300, 0, 0, 1);
}

#current {
  opacity: 1;
  -moz-transform: translateX(0);
  -webkit-transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
}

#next {
  opacity: 0;
  -moz-transform: translateX(1300px);
  -webkit-transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1300, 0, 0, 1);
}

    </style>
  </head>
  <body>
    <iframe id="previous"></iframe>
    <iframe id="current"></iframe>
    <iframe id="next"></iframe>
    <div id="about