ちょっと変更。
function FindProxyForURL(url, host)
{
if(
isPlainHostName(host) ||
isInNet(host, "127.0.0.1", "255.255.255.255") ||
isInNet(host, "10.0.0.0", "255.0.0.0") ||
isInNet(host, "172.16.0.0", "255.240.0.0") ||
isInNet(host, "192.168.0.0", "255.255.0.0")
)
return "DIRECT";
else
return "PROXY 192.168.100.200:3128; DIRECT";
}