Submit Form with Checkbox

[Robber]

Might sound strange but is it possible to trigger a form submission when someone clicks a checbox.

What I want to do is reload the same page with an expanded list of choices depending on the checkbox they tick, as well as selecting the ticked checkbox.

I am looking at using onclick="document.formname.submit();return false;"

But I am getting object doesn't support this property or methid.

Thanks

[Bernard Marx]

Should be OK.
My guess is that you've made the common mistake of giving your submit button the name, 'submit'. This overrides the membername for the form's submit method.

Try:

onclick="if(this.checked) this.form.submit();"

..after renaming the submit button!