[iggy1]

pawn Код:

public OnPlayerRequestSpawn(playerid)
{
    if(JAPCount == USACount)
    {
        new randteam = random(2);//this is assumming the team ids are 0 and 1
        switch(randteam)
        {
            case TEAM_JAPFLEET:
            {
                JAPCount++;
                return 1;
            }
            case TEAM_AIRFORCE:
            {
                USACount++;
                return 1;
            }
        }
    }
    if (LoggedIn[playerid] == 0) return SendClientMessage(playerid,COLOR_RED,"ERROR: You must log in before playing !");
    if (PlayerTeam[playerid] == TEAM_JAPFLEET)
    {
        if (JAPCount > USACount) return SendClientMessage(playerid,COLOR_RED,"INFO: This team is full. Join another team");
        JAPCount++;
    }
    if (PlayerTeam[playerid] == TEAM_AIRFORCE)
    {
        if (USACount > JAPCount) return SendClientMessage(playerid,COLOR_RED,"INFO: This team is full. Join another team");
        USACount++;
    }
}

There might be better ways but thats what i'd do.