<html>
<head>
<title>Hello world!</title>
<link href="dom_tree_test.css" rel="stylesheet" type="text/css">
</head>
<body>
<img src="test.jpg">
<iframe src="/iframe.html" width="400" height="200"></iframe>
<iframe src="/iframe2.html" width="400" height="200"></iframe>
</body>
</html>