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[bogus@does.not.exist.com ()]

   http://www8.hp.com/h20195/v2/GetDocument.aspx?docname=c04164471

I think that is probably a "smart switch" rather than a "managed switch". 
As far as I can tell, the difference is mostly whether the switch can
be controlled from the command line or not so it probably won't
affect you. I expect almost any "smart switch" would support vlans
nowadays, at least the Netgear and Dlink smart switches I have purchased
over the last few years have.

I believe he least expensive actual managed switch is probably the
Cisco Small Business 200 series which is less than $200 but if finicky 
about matching duplex settings with non-Cisco switches, so it is
not a good buy.

Daniel Feenberg