help about this script

[CursorX]

OnMobKill2:
if( rand(100) < 50 ) getitem 969,1;
monster .Map$,0,0,"Thief",1957,1,strnpcinfo(0)+"::OnMobKill2";
end;

how would i edit this into.. ex.

 

i killed the monster name thief then after i kill him (if i got gold on my inventory it will delete it and if i dont hve gold on my inventory there will be no action on it...) (1gold will delete per monster)

 

thank you...

[Patskie]

if ( countitem( 969 ) ) delitem 969, 1;