bootstrap file input

bootstrapfileinput.html

<span class="btn btn-default btn-file">
    Browse <input type="file">
</span>

<style>
  .btn-file {
      position: relative;
      overflow: hidden;
  }
  .btn-file input[type=file] {
      position: absolute;
      top: 0;
      right: 0;
      min-width: 100%;
      min-height: 100%;
      font-size: 100px;
      text-align: right;
      filter: alpha(opacity=0);
      opacity: 0;
      outline: none;
      background: white;
      cursor: inherit;
      display: block;
  }
</style>