Redirecting to the actual page after login

Question

Hi iam developing a website home pages contains some links which will be redirected to login if the user is not logged in yet, if the user has already logged in those will be redirected to actual destinations my requirement after logging in i have to be redirected to actual destination i.e. i have a link link "x" on home page when i click on it (iam not logged in yet) redirects to login page then i will enter login credentials and press enter button by which i have to be directed to the Page "X" can any body help me