How to test if Squid is up?

Hiya,

Does anybody have anytying that will test wether Squid is up
and serving requests, not hung, dead etc?

I would like to put our Squis server on a pager that'll go off
if there are any problems with it.

Alternativly, if anybody can reccomend a good way of testing
it then i'll write something to do it and release the code..

--
Leigh