Web页面中用回车键代替Tab键

   
   <script language="javascript" type="text/javascript">
        function  keyDown()
        {
            var  keycode=event.keyCode;
            var  keyChar=String.fromCharCode(keycode);
            if(keycode==13)
            event.keyCode=9;
        };
       document.onkeydown=keyDown;
    </script>