拖放與更改選項

描述

當拖動進行時，將呼叫此回撥函式。這是拖動事件的首選回撥。

語法

new Draggable('element', {change: 'effectFunction'});

此 effectFunction 是函式, 可定義需要應用的效果。

示例

實況演示

<html>
   <head>
      <title>Draggables Elements</title>
		
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      <script type = "text/javascript" src = "/javascript/scriptaculous.js"></script>
		
      <script type = "text/javascript">
         window.onload = function(){
            new Draggable(
               'myimage', { 
                  change : function(){
                     new Effect.Opacity('myimage', {from:0, to:1.0, duration:1});
                  }
               }
            );
         }
      </script>
   </head>
   
   <body>
      <p>While you drag this image it become disappear.</p>
      <img id = "myimage" src = "/images/scriptaculous.gif"/>
   </body>
</html>

將產生以下結果 -

scriptaculous_drag_drop.htm

列印頁面