add_document

ajax
common attributes
conditions
context
display
1. add_btn
2. add_document
3. anchor
4. calendar
5. check_lang
6. comments_count
7. design
8. img
9. javascripts
10. lang_links
11. link
12. mail_hide
13. search_box
14. set
15. show
16. show_path
17. stat
18. stylesheets
19. summary
20. text
21. title
22. zena
forms
meta
pseudo sql

Display a link to open a popup to upload documents.
`<r:add_document/>`

The tag will appear only if the visitor can write in the current node.