[thelist] JavaScript: detecting and undoing radio button chan ge

[Tom Dell'Aringa]

--- Carl J Meyer <cjmeyer at npcc.net> wrote:
> On Wed, 2003-04-02 at 17:01, Joel Canfield wrote:
> > How? Once another is checked, the original obviously isn't.
> > without resorting to 'onblur' how would you do this? Or, is there
> a way to use 'onblur' without driving oneself crazy?

Remember the power of arrays in JS. A radio group has a NAME, and
that group has an array of elements sharing that name.

so..

document.forms['myForm'].elements['radiogroup'][0]

would give you the first one..etc. So if you want to check (or
recheck) one - say the second one of the group you could do:

document.forms['myForm'].elements['radiogroup'][1].checked = true

You would just put a line like that in your code block where the user
decided he didn't want to check after all, just use the right array
number of the default radio button (which I suppose might be 0 - the
first one.)

HTH

Tom

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