Zoho Sites-Blanking Main menu click-Login Process

Zoho Sites-Blanking Main menu click-Login Process

1) My site has many menu items under a main menu. (Eg., Under Products menu, I have menu items like Product-1, Product-2 etc.,) Normally main menu only will be visible and one has to click it and select the products to view the product details.. But by over-site, if someone, clicks the Main Menu (in this example 'Product') an empty window opens which is undesirable. Kindly send your suggestions to overcome this problem.

2) I wish to make my site visible on subscription basis after an initial promo offer period. How can I control the access after      the promo offer?                
  Once subscription is received, I should be able to enable the access.

 In other words,  there should be a login registration process and for existing  users, after the login and  with the receipt of subscription, the access should be enabled; otherwise disabled. 

Please help.

Thanking you

N VENKATESAN
Ph 9440585732
E Mail: nvn595@gmail.com
Site Name: shrinidhi-enterprises.in