Server Side Java Script Redirects

[zachc_coffeeforless.com]

I would like to use a redirect through a server based Java script to redirect visitors only referenced from a certain site. So let's say anyone clicking on a link to my site page-A from seomoz.org would automatically be redirected to page-B. All other users as well as direct and search engine traffic  would only see the regular page A. The reason I am doing this is because the linking site is linking to page A which doesn't serve the user the correct content. Rather than contacting the webmaster to change the link to point to page -B, I want to redirect them. Is there any danger of Google penalizing this for cloaking? and how would they be able to tell?

[StalkerB]

Ideally, if you do have any contact with the webmaster you'd be better off asking them to change it. If you don't, starting to network with people already willing to link to you is a great way to get more links anyway.

If you really don't want to try and speak with them (and again, you really should) then I have done something similar with affiliates; when they send a visitor I send them to a co-branded page based on the referral header, and haven't seen anything bad happen.

Although Google is getting better at reading javascript it still doesn't seem to follow links run in real time. As you're not intending to deceive the bot your use of it is fairly legit, but I couldn't tell you how it'd be interpreted once the datacentres have a look at it.

Here's the guidelines - http://www.google.com/support/webmasters/bin/answer.py?answer=66355 - up to you if you think you're breaking them