npc/custom/jobmaster.txt

[codebox]

    mes "[Job Master]";
    if (Class > Job_Soul_Linker) {
        mes "No more jobs are available.";
        close;
    }

[/codebox]

Change to:

[codebox]

OnMenu:

    mes "[Job Master]";
    if (Class > Job_Soul_Linker) {
        mes "No more jobs are available.";
        close;
    }

[/codebox]



So, use this script:

[codebox]

-    script    AutoJob    -1,{

OnPCBaseLvUpEvent:

    if ( BaseLevel == 99 && Class >= Job_Knight && Class <= Job_Crusader2 )
        doevent "Job Master::OnMenu";
    end ;

OnPCJobLvUpEvent:

    if ( ( JobLevel == 10 && Class == Job_Novice ) || ( JobLevel == 40 && Class >= Job_Swordman && Class <= Job_Ninja && Class != Job_Super_Novice ) )
        doevent "Job Master::OnMenu";
    end ;

}

[/codebox]



Note: I don't recommend this since you'll have problems with unused skill points and stuff (I'm pretty sure the script will just say "waste your skill points" unless you configure the jobmaster to don't).