[Nagiosplug-help] httping through proxy

[naim abu darwish]

hello.
I'm trying to monitor browsing performance through proxies, i want a
check command to do  something like ::

httping -h www.google.com -x 192.168.20.24:8080 -c 1 -t 2

where the variables are ::
1) 192.168.20.24 is the ip address of the proxy, corresponding to
$$HOSTADDRESS$$
2) 8080  is the port number that the squid proxy is running on, this
could be corresponding to $ARG1$

Could anyone please tell me how to put this in a way nagios understands.
Many thanks

-Naim