How to disable or enable Menu Items based on Login Type of the Logged In User in ASP.Net

Hi,

i have table called ROLE with fields (id,name,permission) example values (1001,madhu,hr)

i have another table called LOGIN with fields(id,DOB,password) example values(1001,24101989,madhukumar)

what i want is , if i login using the LOGIN table ,it  check the  id and permission in the ROLE table , if the permission is 'hr' it enable to access the menu , or if the permission is any other it just print the error message ("no permission")

Note:menu is placed in master page , but login is not in the master page

How can i solve this issue ?

pls help me

thanks in advance