Malsup's jQuery Form plugin - How to dynamically change the url of form action?

Malsup's jQuery Form plugin - How to dynamically change the url of form action?

Hi,

      I have form contains a drop down and some input fields and i am using Malsup's form plugin to submit it. i want to change the action of the form dynamically depends upon the drop down value on form submit.

Can anyone please help me on this?