1.html

<!doctype html>  
<html>  
  <head>  
    <meta charset="utf-8" />
    <title>Test</title>  
    <script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.7/jquery.min.js" ></script>
    <script type="text/javascript">
    	alert((120..toString()+100)*10); //1201000

      var F3;
      function F1(){
        alert(1);
      }
      function F2(){
        alert(2);
      }
      F3=F1.call;
      F1.call(F2);  //1
      F3.call(F2);  //2

    </script>

  </head>  
  <body class="test">  
  </body>  
</html>  