#purxbutton {
      width: 100px;
      height: 55px;
      margin: 0;
      padding: 0;
      border: 0;
      background: url(https://physicsfactory.co.uk/images/tablebutton.png) no-repeat top left;
      background-size: cover;
      vertical-align: middle;
      cursor: pointer; /* hand-shaped cursor */
      cursor: hand; /* IE 5.x */
    }