I'd like to have something like the single cell server has when you click the 'advanced' button. I tried simply copying the html from the save/upload data page, but I get the error:

Error uploading file (missing url arg).


I can't seem to find the necessary html/javascript on the single cell server.

What I tried to use, except with <'s and \n\'s deleted:

html('div>

form method="POST" action="do_upload_data"
div>