"Save Password" on asp.net mobile pages?

[Kir Birger]

My boss wants our mobile page to have a save password checkbox that will load your last used username and password into the appropriate input fields on the login page from your cookie. This is all well and good, except that asp.net does not want you to preset password fields period. Nor does it want you to use <% %> tags to enter html into your page. IS there a way to do this?