JavaScript try catch 语句

JavaScript try catch 语句

<html>

   <head>

      <script type = "text/javascript">
         <!--
            function myFunc() {
               var a = 100;
               try {
                  alert("Value of variable a is : " + a );
               }

               catch ( e ) {
                  alert("Error: " + e.description );
               }
            }
         //-->
      </script>

   </head>

   <body>
      <p>Click the following to see the result:</p>

      <form>
         <input type = "button" value = "Click Me" onclick = "myFunc();" />
      </form>

   </body>
</html>