Redirect function for plugin

I have made a plugin which lets people add Google+1 feature to their blog, which is working fine.

Now I want to add another feature in it which will redirect people to a URL of the site owners choice after someone has given them a vote up using the button. Basically they can notify the visitors that they will get a goody when they vote up the +1 button and will be redirected to their download page as soon as they click on the vote button. Basically a “BRIBE” script.

Now there are various forms of logic to implement this ‘bribe’ feature(basically an onclick redirect) but I would like to know the best and easiest way to accomplish it. I am trying to download various redirect related plugins to study the code but all of them are the 301 permanent URL redirect plugins which I don’t want. Can you help me with the redirect script knowing the requirements of the plugin or atleast direct me to a resource that will let me use it in my plugin?

Thanks in advance for any responses ??