var url;
var host;

    function FindProxyForURL(url, host)
    {
      if (isPlainHostName(host))
                    return "DIRECT";
         else
               return "PROXY w3cache.mimuw.edu.pl:8080; PROXY w3cache.icm.edu.pl:8080; " +
                       "DIRECT";

    }

 ret = FindProxyForURL(url, host);