use Ext.get() to get a html tag
<html>
<head>
<title>Hello World Window</title>
<link rel="stylesheet" type="text/css" href="ext-3.0.0/resources/css/ext-all.css" />
<script type="text/javascript" src="ext-3.0.0/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext-3.0.0/ext-all.js"></script>
<style type="text/css">
div {
border : 1px solid #AAAAAA;
width : 200;
cursor : pointer;
padding : 2px 2px 2px 2px;
margin : 2px 2px 2px 2px;
}
</style>
</head>
<body>
<script type="text/javascript">
Ext.onReady(function() {
var myDiv1 = Ext.get('div1');
myDiv1.createChild({
tag : 'div',
html : 'Child ' + 1
});
});
</script>
<div id='div1'>asdf</div>
<div id='div2'>asdf2</div>
</body>
</html>
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