Просмотр исходного текста страницы JavaScript DHTML/Object Oriented/prototype

==Add description property to Number objects==




   
  <!-- start source code -->
   
    <source lang="html4strict">
  
<html>
<head>
  
  <script type="text/javascript">
     
    Number.prototype.description = null;
    slHighway = new Number(65);
    slHighway.description = "Interstate Highway Speed Limit";
    function tellDifference(num1) {
      document.write(num1.description);
    }
  </script>
</head>
<body>
  <script type="text/javascript">
    tellDifference(slHighway);
  </script>
</body>
</html>
   
    
  </source>