Can someone help me with a subscribe button?

I want to put a one-click subscribe button on a page that I use with traffic exchange programs. I know how to do that. Basically it's done by making the button action send an email to my autoresponder from the visitor's email program.

Here's my problem. I don't want to just send an email. I want the subscriber to automatically go to my thank-you-for subscribing page where I can tell him to watch for the confirmation email and also where I can get a count of the number of people who subscribed from that particular landing page.

Is there a way to make the button do both of those things? Or I could have the button just send the subscriber to the thank-you page if I could make it so that page automatically activates the visitors email program. Perhaps there could be a JavaScript script that activates the visitor's email program when the page opens.

Any information on this would be appreciated.

I suspect that I'll get more subscribers when there's an option to subscribe by simply clicking on a button rather than having to type into a form. I realize that the autoresponder service doesn't get the subscriber's IP address when done that way, but that's okay with me.