Is this site down script

(* quick way to check if a domain is down, save it as an .app and put it in the Dock for 1-click access!
(C) Applehelpwriter.com 2013
*)

display dialog "enter the domain to check" default answer "www.example.com"
set theSite to text returned of the result as string
do shell script "scutil -r " & theSite
if the result = "Reachable" then
    display dialog "Site is up!"
else
    display dialog "Site is not reachable!"
end if