Web page analysis tool needed

["Roger Vicker, CCP" <rv-tech@xxxxxxxxxx>]

With more businesses blocking web access (or doing content filtering)
and web pages embedding things from other sites it is becoming harder to
manage.

I have customers that block web access but with exceptions. Some of the
exceptions later don't work. Usually the reason is they have embedded an
image, jscript or such from another site.

What I need is some software (preferably free) that I can point at a
page and it will till me all the domains it uses. Links don't count.
Then management can decide if they want to add the other content to the
exceptions or the base site isn't worth the productivity risk.

Any suggestions?

Roger Vicker, CCP