How do I run an Applescript everytime I run a Copy command (Command C)?

Question

Here is my current script which is designed to replace text in the clipboard:
get the clipboard
set the clipboard to (replacement of "admin" by "www" for the result)
on replacement of oldDelim by newDelim for sourceString
  set oldTIDs to text item delimiters of AppleScript
  set text item delimiters of AppleScript to oldDelim
  set strtoks to text items of sourceString
  set text item delimiters of AppleScript to newDelim
  set joinedString to strtoks as string
  set text item delimiters of AppleScript to oldTIDs
joinedString
end replacement
I want to run everytime I copy something to the clipboard, but am not sure how. Anny help is appreciated.

Answer 1

Are you wanting to make this change for one application or all applications?
You will need to re-assign command + c to your script.  You may miss some functionality of the command + c.  Not sure if you can simulate a command + c from the script.   You could try using the applications edit function for copy the highlighted text to the clipboard.  Here are the related unix commands
pbcopy  Copy data to the clipboard
pbpaste  Paste data from the Clipboard
I think it would be best to do this for only one application. 
If X's key reassignment does not do what you want, try iKey.
http://plumamazing.com/mac/ikey
I do something similar to this.  I do command + c,  f12 which invokes my applescript, then command + v