How To Hide Future's Records (id=?)

I have a site, constructed with dreamweaver, that contains a master-detail page set.
I have make some changes to the code (although I 'm not a programmer, I am beginner), so that I can insert records that will

be displayed when the date of the record is equal to the current date(server's date).

The detail page is something like http://localhost/1.asp?id=495

My problem: I discovered that anyone that hits to the browser any other id number by hand(example

http://localhost/1.asp?id=496), can view the records I wanted to be displayed when the appropriate date come!

So, I have not any way to protect my records from these people?

What can I do, so that nobody can see the future's records above the current date?

The master page already has a 'where' statement, and displays only the records with date=< current date.

My problem is at the detail page.

Suppose someone hit in the browser, just because he wants to cheat me, write another id in address bar, replacing the one the browser currently displays.

Thenhe has discover a brand new page which should be online in the future.

That's my problem.

It would be nice if I could hide the real address from browser address bar.

Or if I could somehow change it in order not to reveal the real address and this could make it more difficult for someone to reveal future's pages.

I know the use of frames hides such information(exact address) but as far as I know this solution has many disadvantages.