Fixed in r24272:

The previous code was using the 'onmouseup' event to trigger the shift-click multiple selection behavior. This had a number of problems:

• Opera 6.0 doesn't fire this event on radio buttons
• Opera 7.x and 8.x flip the check state before sending the event, while Opera 9.x and other browsers flip it after
• A UA check for Opera was used to work around the state inconsistency for 7.x and 8.x, which broke on 9.x
• Minor quibble: the event fires if you click outside the radio and release while the mouse is over it, though that wouldn't normally count as a click on the radio.

I've switched it to use the 'onclick' event handler instead, which resolves this:

• Opera 6.x fires this event
• All tested browsers have flipped the check state before the event, so special-case code can be removed.

Tested browsers:

• Opera 9.2, 9.0, 8.5, 8.0, 7.5, 6.0/Mac
• Firefox 2/Mac
• Safari 2/Mac
• Safari 3/Win
• IE 7/Win
• IE 6/Win
• IE 5.2/Mac
• iCab 3/Mac
• Mozilla 1.1/Mac

nvervelle wrote:

I think the bug fix introduced a side effect :

I have created an extension that can create checkboxes through Javascript with my on event handler for onclick(). With this fix, checkboxes don't work any more (no events). See http://wiki.jmol.org/index.php/Sandbox for an example

Could wikibits.js be modified again for only calling "cb.onclick = checkboxMouseupHandler" only when there's not already a handler for cb.onclick ?

Thanks in advance,
Nico

Switching to adding an event handler hook instead of setting onclick explicitly would probably fix this...