JavaScript works in the background with HTML5 web worker examples

First Page

<!DOCTYPE html>
<html>
   <head>
      <title>HTML5 Web Worker examples</title>
      <script type="text/javascript">
         if(window.Worker){
            var worker;
            worker = new Worker("js/ker.js");
            worker.onmessage = function(event){
               document.getElementById("result").innerHTML = event.data;
            };
         } else{
           alert("Sorry, your browser do not support web worker.");
         }
     </script>
   </head>
   <body>
      <div id="result">
      </div>
   </body>
</html>

Output

First Page