I've seen this done before on some webpages. There is a link to another page, and when you click on the link, it automatically fills out the forms on the destination page with information.

For example, the site I saw it on linked to a "vote for this site" page on another website, and when you clicked on it, it would automatically put the website's url in a form that asked what site you wanted to nominate. I can't remember the exact syntax.. so if someone could help, that'd be awesome