稍微书上代码不适合。
var btns = Ext.select('input');
需要更改为：
var btns = Ext.select('input', true);
不然报错：
[E] Ext.dom.Fly.addListener(): Cannot use addListener() on Ext.dom.Flyinstances. Please use Ext.get() to retrieve an Ext.dom.Element inst..。。。
<!DOCTYPE html>
<html>
<head>
<title>ExtJs</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<link rel="stylesheet" type="text/css" href="ExtJs/packages/ext-theme-crisp/build/resources/ext-theme-crisp-all.css">
<script type="text/javascript" src="ExtJs/ext-all.js"></script>
<script type="text/javascript" src="ExtJs/bootstrap.js"></script>
<script type="text/javascript" src="ExtJs/packages/ext-theme-crisp/build/ext-theme-crisp.js"></script>
<script type="text/javascript">
Ext.onReady(function(){
var loader = Ext.get('content-div').getLoader();
var btns = Ext.select('input', true);
btns.addListener('click', function(e, btn){
var contentUrl = '9-5-' + btn.value + '.html';
load(contentUrl);
});
function load(contentUrl){
loader.load({
url: contentUrl
});
}
});
</script>
</head>
<body>
<div id="content-div" style="width:200px solid #ccc"></div>
<input type=button value='page1'>
<input type=button value='page2'>
</body>
</html>
