accessing page thru main page only.

I have a web page which should not be accessed directly. That is it has to be accessed thru a parent page. How can this be done? For eg this can happen when you are trying to do a google search... It can some times directly lead you to the child page. How to solve this?

You can check the document.referer If the referer is not the main page then send them back to the parent page.

document.referrer works fine but i have a situation...
I have a page(p1.htm) which has two buttons "agree" "do not agree"
when I press agree the current window closes and opens another new window(p2.htm). So when I use document.referrer in p2.htm page it shows null.
How to take care of this?
I do not want the user to directly open p2.htm without going thru p1.htm.
Thanks and appreciate ur help.

when you open a new window it will cause this to happen since it will have no referer. You might want to look into using query strings..
Eric