[Evolution] mime-type for vcard import?

[gnalle ruc dk (Niels L. Ellegaard)]

I would like to click a vcard on a webpage to add it to my
evolution-2.0 contact list. Is it possible to define a mime-type that
does the trick? Something like

text/x-vcard;evolution --import %s     ??

I am asking because I just found a danish phonebook-website that
returns vcards. 

Anyway, thanks for a great program. I just found it and I am allready
having great fun.

                              Niels