mediumvote breaks vote_up_down widget

The mediumvote module breaks the vote_up_down digg style widget (CVS version).

Apparently this is due to the fact, that ajax_mediumvote.js declares the same object as http response handler (VDB). The result is that if you click on the + symbol under the (per default yellow) number field on the vote_up_down widget, the symbol gets replaced by the number field.

I worked around by renaming the VDB object to _VDB - probably there is a smarter solution, but for the time being, it could be good to replace the 3 occurrences of VDB in ajax_mediumvote.js by _VDB.

alex