[UPHPU] submitting a form with javascript, dynamic form name

[Wade Preston Shearer]

I am submitting a form with javascript like this…

document.formname.submit();


I need the name of the form to be a variable though. Is that possible?  
Meaning, that "formname" should be a variable instead of the actual  
name of the form.

I tried…

document. + formname + .submit();


…but that didn't work.
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