root/npc/sample/npc_testchkoption.txt @ 7

prontera,156,89,6       script  test_chkoption  117,{
        mes "Please enter a value of type!";
        input @value;
        if(checkoption(@value) == 1) goto L1;
        if(checkoption(@value) == 0) goto L0;
        end;
        L1:
                mes "True!";
                close;
                end;
        L0:
                mes "False!";
                close;
                end;
}