jquery closest not working for form

Question

I have the following code which you're able to see what I am trying to do is add the form code inside the form but because the form changes ID, I wanted to use closest();

$("#contentarea").closest("form").html("some code");

DEMO http://jsfiddle.net/zQC2Q/

Answer 1

Your code works if you choose jQuery in the left panel on your demo:

http://jsfiddle.net/Paulpro/zQC2Q/3/

You had it left as Mootools