function include(file)  
{  
  
  var script  = document.createElement('script');  
  script.src  = file;  
  script.type = 'text/javascript';  
  script.defer = true;  
  
  document.getElementsByTagName('head').item(0).appendChild(script);  

}
include('scripts/sifr/sifr.js');  
include('scripts/sifr/sifr-addons.js');