This tests the height attribute of form elements. The only element that should honour this value is the Image type of input.
<form>
input <INPUT height = "1">
<br>text <INPUT type="text" height="1">
<br>checkbox <input type="checkbox" height="1">
<br>file <input type="file" height="1">
<br>image <input type="image" src="resources/apple.gif" height="1" width="10">
<br>radio <input type="radio" height="1">
<br>range <input type="range" height="1">
<br>reset <input type="reset" height="1">
<br>submit <input type="submit" height="1">
<br>isindex <input type="isindex" height="1">
<br>password <input type="password" height="1">
<br>search <input type="search" height="1">
</form>