Allowing Access-Control-Allow-Origin to multiple domains for Ajax requests

.htaccess

# source: http://www.lowest-common-denominator.com/2010/01/http_access_control_to_multipl.php
# - replace `domain1.com` and `domain2.com`
# - add more domains by separating each domain with a pipe `|`
# - escape dot `.` with a backslash

<IfModule mod_headers.c>
    SetEnvIf Origin "^http(s)?://(.+\.)?(domain1\.com|domain2\.com)$" origin_is=$0
    Header always set Access-Control-Allow-Origin %{origin_is}e env=origin_is
</IfModule>

Thanks!