3surl

tell application "System Events"
 set numSafari to count (every process whose name is "Safari")
 set numChrome to count (every process whose name is "Google Chrome")
end tell

set tabNum to 3

if numSafari > 0 then
 tell application "Safari" to set longURL to  URL of tab tabNum of front window
else
 if numChrome > 0 then
   tell application "Google Chrome" to  set longURL to  URL of tab tabNum of front window
 end if
end if

set safeURL to do shell script "~/bin/escapeurl " & "'" & longURL & "'"
set cmd to "curl 'http://metamark.net/api/rest/simple?long_url=" & safeURL & "'"
do shell script cmd