<html>
<head>
<title>回調函數(callback)</title>
<script language="javascript" type="text/javascript">
function a(callback)
{
alert("我是parent函數a!");
alert("調用回調函數");
callback();
}
function b(){
alert("我是回調函數b");
}
function c(){
alert("我是回調函數c");
}
function test()
{
a(b);
a(c);
}
</script>
</head>
<body>
<h1>學習js回調函數</h1>
<button onClick=test()>click me</button>
<p>應該能看到調用了兩個回調函數</p>
</body>
</html>javascript