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Thanks, those are reasonable suggestions.
In the first suggestion, I'm unclear about one aspect of how I would accomplish this. I assume I would allow people to modify fields in the form, but that when they did, a msgbox would pop up that would inform them that, if they continued with this modification to a signed form, the signature would be removed. I'm all good to that point. But if they answered that they do not want to continue modifying that field and removing the signature, how can I code it to set the value back to what it was before the change? Is there some method that will give me access to the value of the field BEFORE the attempted modification? I went looking for something like $.previousvalue, but found nothing.
I'd suggest that I could use a two-stage solution, in which I store the previous value on the enter event, and save it just in case they do not want to change the field when prompted by the msgbox, but since the enter event does not exist for checkboxes (my original problem), that seems like it won't work.
As far as radio button suggestion, I like radio buttons very much except for one fatal flaw: they aren't (as far as I can tell) clearable. That is a shame. Clearly some people (like me) want both exclusivity AND clearability. And we'd like the controls to have an enter event. But I know I'm demanding
Anyway, as it is, I just end up having to use checkboxes and create a boatload of silly code to make them exclusive.
Emily
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