We're running on a Windows domain, and have a DNS to control computer names on our intranet.

The following PAC works great for basic hostnames on our intranet - but we're setting up some subdomain-like names (example, redesign.buildbox), and it isn't resolving these. These subdomains are resolvable through other means (such as nslookup).

Other than checking to see if the host has ".buildbox" or other domain, is there a way to make it work? Maybe I could try appending the Windows domain to host (can you concatenate strings in a PAC)?

function FindProxyForURL(url, host) {
  // If IP address is internal or hostname resolves to internal IP, send direct.
  var resolved_ip = dnsResolve(host);

  if (isInNet(resolved_ip, "129.2.2.0",  "255.255.255.128"))
    return "DIRECT";

  if (isInNet(resolved_ip, "10.1.1.0", "255.255.255.0"))
    return "DIRECT";

  if (isInNet(resolved_ip, "150.1.2.0", "255.255.255.248"))
    return "DIRECT";

  // All other traffic uses below proxies, in fail-over order.
    return "PROXY 192.111.222.111:8080; DIRECT";
}