function scr_monster_add(arg0, arg1)
{
    __returnid = -1;
    for (__mopenslot = 0; __mopenslot < 3; __mopenslot++)
    {
        if (global.monster[__mopenslot] == 0)
        {
            global.monstertype[__mopenslot] = arg0;
            global.monsterinstancetype[__mopenslot] = arg1;
            scr_monster_statreset(__mopenslot);
            scr_monster_makeinstance(__mopenslot);
            __returnid = __mopenslot;
            break;
        }
    }
    return __returnid;
}