Providing menu accessability depending on user login

Question

Hi,
   i am developing an application in which i have created master page. i have 3 users in my application i.e admin, coordinator and user. depending on the user login i need to show and hide some menu items. For example for admin user i need to show menu1, menu2 and menu3,submenu1,submenu2, for coordinator i should show menu1 and menu2 and for user i need to show menu1 and menu3. i have created login page after enterinh username and password depending on user login i should show the menu. i am new to this kind of application please suggest me how to do this using asp.net.


With Regards
Ashwini