setting more than 1 -domain=> in cookies

[A Taylor]

Hello all,
I have a perl script that I am using to write a cookie:

 my $cookie = new CGI::Cookie(-name=>'usrID',
         -value=>$usrID,
         -expires=>'+4h',
          -domain=>'.mydomain.com',
         -path=>'/');

 ## send cookie
 print "Set-Cookie: $cookie\n";

What I want to know is the a way of setting more than 1 domain ??? ie:
-domain=>'.mydomain.com, .mydomain2.com' for example ???

I am still trying to figure out why i cant read cookies when my perl scripts
are taken into a frame ???
My perl scripts are on 1 domain and my framset is on another - there must be
a way around this ??

thanks again for your help

Anadi