JavaScript return 语句

JavaScript return 语句

<html>
   <head>

      <script type = "text/javascript">
         function concatenate(first, last)
         {
            var full;
            full = first + last;
            return full;
         }

         function secondFunction()
         {
            var result;
            result = concatenate('Zara', 'Ali');
            document.write (result );
         }
      </script>

   </head>

   <body>
      <p>Click the following button to call the function</p>

      <form>
         <input type = "button" onclick = "secondFunction()" value = "Call Function">
      </form>

      <p>Use different parameters inside the function and then try...</p>

  </body>
</html>