<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<title>52-frameset.html</title>
<body>
<div id="content">52-iframeset.html</div>
<a id="change_frame" onclick="javascript:document.getElementById('iframe').src='50-form2.html';" href="#">Change frame</a>
<a id="change_frame_404" onclick="javascript:document.getElementById('iframe').src='does-not-exist.html';" href="#">Change frame to 404</a>
<iframe src="52-subframe.html" id="iframe" name="iframe">
</body>
</html>