Drupal - form module with download

Scenario: I have a view with a custom php field. This view shows a profile-image. (I‘m using image cache for profile-images) In this field I want to call a function that build a form with a dropdown. If you select a format in the menu the download should start. The $options array from my view could look like that : Array ( [- select -] => select [Original] => /is/htdocs/xxxx/www/_file-upload/research4/user_avatar_upload/[login to view URL] [800x600 px] => /is/htdocs/xxxx/www/_file-upload/research4/imagecache/800x600/user_avatar_upload/[login to view URL] ) Your task: Write a small module with a form function in it, to call the function from a view. Maybe use ahah! I try to use the ahah helper module - with no luck... now it's your turn. Take my module as a starting point. On select the download should start. Cheers Kai