How to keep form values in case of submition failure

[Jawad K.]

Hi,

I checked web2py book and found that we can use crud.settings.keepvalues = False for successful form submission but I want to know how can we use on failure..?
I want to keep value of email address field on login page using form=crud(), currently when user try to login with invalid username and password, the page refresh and error message appears but email id disappears.

Regards,

Jawad K.