jQuery实例 - 淡入浅出

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
      <button id="in">fadein</button>
      <button id="out">fadeout</button>
      <button id="toggle">fadetoggle</button>
      <button id="fadeto">fadeto</button>

      <div id="id1" style="display:none; width: 80px;height: 80px;background-color: blueviolet"></div>
      <div id="id2" style="display:none; width: 80px;height: 80px;background-color: orangered "></div>
      <div id="id3" style="display:none; width: 80px;height: 80px;background-color: darkgreen "></div>

    <script src="../../jquery-1.12.4.js"></script>
    <script>
        $(document).ready(function(){
            $("#in").click(function(){
               $("#id1").fadeIn(1000);
               $("#id2").fadeIn(1000);
               $("#id3").fadeIn(1000);

            });
            $("#out").click(function(){
               $("#id1").fadeOut(1000);
               $("#id2").fadeOut(1000);
               $("#id3").fadeOut(1000);

            });
            $("#toggle").click(function(){
               $("#id1").fadeToggle(1000);
               $("#id2").fadeToggle(1000);
               $("#id3").fadeToggle(1000);

            });
            $("#fadeto").click(function(){
               $("#id1").fadeTo(1000,0.4);
               $("#id2").fadeTo(1000,0.5);
               $("#id3").fadeTo(1000,0);
            });
        });
    </script>
</body>
</html>