Radio buttons not checked in jQuery

if ( ! $("input").is(':checked') )

Doesn't work?

You might also try iterating over the elements like so:

var iz_checked = true;
$('input').each(function(){
   iz_checked = iz_checked && $(this).is(':checked');
});
if ( ! iz_checked )

if ($("input").is(":not(:checked)"))

AFAIK, this should work, tested against the latest stable jQuery (1.2.6).

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