[jQuery] form.submit() is not a function

I am using the excellent Validate plug-in, and I configured the submitHandler function to double check something with the user before submitting. When done, I was calling "form.submit()" and getting the error "form.submit() is not a function". I scratched my head over this for quite a while before

[jQuery] Re: Double click to submit form

Did you find a solution to this? I'm getting the same error, and I have no clue what is triggering it.