代码示例:(标识:jquery_animation)
<!DOCTYPE html>
<html>
<head>
<script src="/jquery/jquery-1.11.1.min.js"></script>
<script> 
$(document).ready(function(){
  $("button").click(function(){
    var div=$("div");
    div.animate({height:'300px',opacity:'0.4'},"slow");
    div.animate({width:'300px',opacity:'0.8'},"slow");
    div.animate({height:'100px',opacity:'0.4'},"slow");
    div.animate({width:'100px',opacity:'0.8'},"slow");
  });
});
</script> 
</head>
 
<body>

<button>开始动画</button>
<p>默认情况下,所有 HTML 元素的位置都是静态的,并且无法移动。如需对位置进行操作,记得首先把元素的 CSS position 属性设置为 relative、fixed 或 absolute。</p>
<div style="background:#98bf21;height:100px;width:100px;position:absolute;">
</div>

</body>
</html>
运行结果: