<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$("img").attr("src","http://michaellauhk.com/diary/wp-content/uploads/2011/06/apple-logo.jpg");
});
});
</script>
</head>
<body>
<img src="http://www.newmobilelife.com/wp-content/uploads/2011/05/apple.jpg" />
<br />
<button>change</button>
</body>
</html>
說明：
使用attr()，第一個參數指定要控制哪個屬性，第二個參數則是屬性質。
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