<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("#div1").fadeIn();
$("#div2").fadeIn("slow");
$("#div3").fadeIn(3000);
});
});
</script>
</head>
<body>
<p>演示带有不同参数的 fadeIn() 方法。</p>
<button>点击这里，使三个矩形淡入</button>
<br><br>
<div id="div1" style="80px;height:80px;display:none;background-color:red;"></div>
<br>
<div id="div2" style="80px;height:80px;display:none;background-color:green;"></div>
<br>
<div id="div3" style="80px;height:80px;display:none;background-color:blue;"></div>
</body>
</html>