If you have your heart set on having the file upload widget beneath the import .xls file, the simplest thing to do is use a Boolean. Create a variable '_importFileDisplay' and '_typeImputDisplay' and then have those Booleans on the page. Have on-change events on both Booleans that set the other to false when one is clicked. That way you can simulate a radio button. You can use conditional visibility to show or hide the file document uploader widgets if you want, and when _importFileDisplay is set to true you can upload the file. That will allow you to build what you want without extra css manipulation.
How can i pass object and other two variables into page?