Hard task to acomplish , .htaccess can you help me?

[aliens112]

I want to do two things with .htaccess.
First is: am I able to show a percentage of my visitors a different page than other percentage.
For example I want 20% of the visitors to see a different image than 80% of the visitors. Is that possible trough htaccess? Can you give me examples? Thanks.

The other thing is I want a certain page of mine to be seen only once by a certain iP. For example let's say I send a massage to a guy tough e-mail to a private page. He goes there, but after that I don't want him to be able to go there again. Instead of that he should see another page. Can I do this trough htaccess?

Thanks for your help :)

[g1smd]

First one. No. You need to do that in your script.

Second one. You can do part of that in .htaccess, but you are better off programming it in a script.

[edited by: jdMorgan at 1:14 am (utc) on Mar. 26, 2009]
[edit reason] fixed typo. [/edit]

[aliens112]

can you post an example script? thanks :)