<img onclick="apoSnow()" src="/images/Msnow.png" width="100px" height="100px" class="apoCloud" />  
  <script src="/js/snow.js"></script>  
  <script src="/js/snowfall.min.jquery.js"></script>  
  <style>  
  .apoCloud {position:fixed;top:-10px;right:10px;z-index:5;}  
  </style>