[webkit-dev] Disabled rendering of <Input type = image />

Hi, Does anybody know what the correct behavior of an input item of type=image should do e.g. <input type="image" onclick="alert();" ...etc... /> As I get the right click behavior i.e. Not responding to clicks, but the item doesn't render as disabled, also the accessibility also doesn't report correctly. Presently googles imply should render disabled, although it's not clear cut it seems. http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.12 Thanks Mark.