Result of expression ‘document.forms[0].submit’ [[object HTMLInputElement]] is not a function.

I was trying to add a small delay into my form submission like so:
<form … onsubmit=”setTimeout(’document.forms[0].submit()’,2000);return false;”>
but everytime I tried it, I got the following error:
Result of expression ‘document.forms[0].submit’ [[object HTMLInputElement]] is not a function.
This one had me stumped, until I realized what it was telling me… that my submit button was named “submit”.
<input type=”submit” [...]