语法：$(selector).toggle(speed,callback,switch)

实例：

 <script src="js/jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $("input").click(function () {
                $("img").toggle(1000);//逐渐隐藏
            }
            );
        });
    </script>

<body>

  <input type="button" value="HideOrShow" />

   <p> <img  src="images/1.jpg"/></p>

</body>