Password Reset, Old password used again

We started sending email reminder for user to change password, they visit the page but use the same old password again, how to prevent that from happening. Please suggest some technique.
Unfortunately there's nothing built into the SQL Membership provider that provides this functionality. The membership provider would have to be extended to implement this functionality.

I haven't read it, but there's a blog article where somebody has done just that:

https://ronanmoriarty.wordpress.com/2012/03/14/implementing-password-history-using-a-custom-membership-provider/
Thanks for the link.

I injected little javascript to test on the client side, not that great solution but gets the work done for me now.
meadhikari wrote:
Thanks for the link.

I injected little javascript to test on the client side, not that great solution but gets the work done for me now.
hi meadhikari, can you show me how to add the javascript?
i also need the feature to check the password when the user going to change the old password is not the same with the new one, password <> new password