Je to Javascriptem... nadlidský výkon je zobrazit si zdroják...

<div id="zoom">
   <table border="0" cellpadding="0" cellspacing="0" id="zoom_td">
      <tr>
        <td align="right" width="20">
          <a class="zoom-out" href="#zoomOut" title="Make the game smaller">&#160;</a>
        </td>
        <td width="164" align="center" style="text-align:center;">
           <div id="zoomSlider" style="padding: 0px; width: 154px; margin: 0 auto; text-align:center;"></div>
        </td>

        <td align="left" width="20">
          <a class="zoom-in" href="#zoomIn" title="Make the game bigger">&#160;</a>
        </td>
        <td>
          <a class="zoom-reset btn_orange" href="#zoomReset" title="Reset size"><span>Reset size</span></a>
        </td>
      </tr>
    </table>

</div>
<script type="text/javascript">
<!--
	var slider = new dhtmlxSlider('zoomSlider', 154, 'tweens', false, 50, 200, 100);
	slider.init();
	slider.attachEvent("onChange", zoomObject);
	$('#zoom_td a.zoom-in').click(function(){ slider.setValue( slider.getValue() + 20 );return false;});
    $('#zoom_td a.zoom-out').click(function(){ slider.setValue( slider.getValue() - 20 );return false;});
    $('#zoom_td a.zoom-reset').click(function(){ slider.setValue( 100 );return false;});
-->
</script>