How to set password guidelines in Joomla?

I am using Joomla 1.7 with 开发者_运维百科Hikashop. That's why I want new registered users to have a secure password. Is it possible to set password guidelines in Joomla, so that it isn't possible to register a user with a password like "12345" or "qwerty"?

You can do that on clientside via additional Javascript or on serverside via an custom/extended authentification plugin.