In XHTML I know that this is correct for a checked radion button:
<input type="radio" checked="checked" name="bar" value="baz" />
And absence of the checked attribute means that the radio button is unchecked:
<input type="radio" name="bar" value="baz" />
But would this be correct for unchecked radio button as well:
<input type="radio" checked="" name="bar" value="baz" />
No actually using
will also render the checkbox checked in the browsers i’ve seen (how strange it might look)!