How to disable Autofocus on Login form widget

Hi,
The Autofocus is active on your Login Form Widget for Membership Pro.
This causes a problem on my website as it forces the homepage to scroll down to the login from automatically. Therefore, the top of the homepage is not displayed to my users.

Have a look here (test website):
http://jrey.o2switch.net/carnetsdevol_TEST/

Can you tell me how to desactivate this "autofocus" function.

Thanks,
Julien