Dynamically Load JS/CSS using Javascript Function:

Dynamically Load JS/CSS using Javascript Function:
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<input type="button" onclick="helper()" value="Helper">

   <script language="JavaScript">
   function helper()
   {
      var head= document.getElementsByTagName('head')[0];
      var script= document.createElement('script');
      script.type= 'text/javascript';
      script.src= 'helper.js';
      head.appendChild(script);
   }
   </script>