> IIRC, it's invalid HTML unless exactly one of the radio > button options is selected.
That's not true. Not really. From the specs: <QUOTE> Radio buttons are like checkboxes except that when several share the same control name, they are mutually exclusive: when one is switched "on", all others with the same name are switched "off". The INPUT element is used to create a radio button control. If no radio button in a set sharing the same control name is initially "on", user agent behavior for choosing which control is initially "on" is undefined. Note. Since existing implementations handle this case differently, the current specification differs from RFC 1866 ([RFC1866] section 8.1.2.4), which states: At all times, exactly one of the radio buttons in a set is checked. If none of the <INPUT> elements of a set of radio buttons specifies `CHECKED', then the user agent must check the first radio button of the set initially. Since user agent behavior differs, authors should ensure that in each set of radio buttons that one is initially "on". </QUOTE> Authors _should_ pre-check one item, but are not required to. Since it's not possible in most UI's to set a radio group back to "no items selected" it's usually bad design to have none selected initially. The user can't restore the form to its original state if they accidently click in the wrong place. I would be able to tell you why the JS is failing if you post the source, but a better solution might be to re-think your design and consider whether a group of radio buttons is really the interface you want to use. Matt Kruse
