Guest User Logged in

Hi Guys I have a cms system where we log into the site and change content and images, now we want guests to log in but i need to make everything read only. like the textboxs must be read only and the buttons must be disabled. when creating the user the user i save the username and encrypted password and i use cookieless sessions. now i have many pages that have controls, like the (EditUser.aspx) has textboxs and buttons, and so forth on other pages. I basically want when a username GUEST logs in, i want to make everything in all my pages read only! How do i do this? any examples? Kind Regards Nivash ...