Removing control chars (including console codes / colours) from script output

I can use the "script" command to record an interactive session at the command line. However, this includes all control characters *and* colour codes. I can remove control characters (like backspace) with "col -b", but I can't find a simple way to remove the colour codes. Note that I want to use the command line in the normal way, so don't want to disable colours there - I just want to remove them from the script output. Also, I know can play around and try find a regexp to fix things up, but I am hoping there is a simpler (and more reliable - what if there's a code I don't know about when I develop the regexp?) solution. To show the problem:

spl62 tmp: script
Script started, file is typescript
spl62 lepl: ls
add-licence.sed  build-example.sh  commit-test         push-docs.sh
add-licence.sh   build.sh          delete-licence.sed  setup.py
asn              build-test.sh     delete-licence.sh   src
build-doc.sh     clean             doc-src             test.ini
spl62 lepl: exit
Script done, file is typescript
spl62 tmp: cat -v typescript
Script started on Thu 09 Jun 2011 09:47:27 AM CLT
spl62 lepl: ls^M
^[[0m^[[00madd-licence.sed^[[0m  ^[[00;32mbuild-example.sh^[[0m  ^[[00mcommit-test^[[0m         ^[[00;32mpush-docs.sh^[[0m^M
^[[00;32madd-licence.sh^[[0m   ^[[00;32mbuild.sh^[[0m          ^[[00mdelete-licence.sed^[[0m  ^[[00msetup.py^[[0m^M
^[[01;34masn^[[0m              ^[[00;32mbuild-test.sh^[[0m     ^[[00;32mdelete-licence.sh^[[0m   ^[[01;34msrc^[[0m^M
^[[00;32mbuild-doc.sh^[[0m     ^[[00;32mclean^[[0m             ^[[01;34mdoc-src^[[0m             ^[[00mtest.ini^[[0m^M
spl62 lepl: exit^M

Script done on Thu 09 Jun 2011 09:47:29 AM CLT
spl62 tmp: col -b