ads.html

<script type='text/javascript'>
  //...
  //...
  gptadslots[6]= googletag.defineSlot('/72776159/LifeandStyle/' + var_section, [[300,250]],'box_4').defineSizeMapping(mappingBox).setTargeting('pos',['6']).addService(googletag.pubads());
  // ... 
  //...
</script>

<div id='box_4'>
  <script type='text/javascript'>
    googletag.cmd.push(function() { googletag.display('box_4'); });
  </script>
</div>