<!DOCTYPE HTML>
<html>
<!-- Use an unload handler to prevent bfcache from messing with us -->
<body onunload="parent.childUnloaded = true;">
<select id="select">
<option>aaa</option>
<option>bbbb</option>
</select>
<textarea id="textarea">
</textarea>
<input type="text" id="text">
<input type="password" id="password">
<input type="checkbox" id="checkbox">
<input type="radio" id="radio">
<input type="image" id="image">
<input type="submit" id="submit">
<input type="reset" id="reset">
<input type="button" id="button input">
<input type="hidden" id="hidden">
<input type="file" id="file">
<button type="submit" id="submit button"></button>
<button type="reset" id="reset button"></button>
<button type="button" id="button"></button>
</body>
</html>