Ok, sorry, Im stupid!!
the solution is simply to write :
CODE
button -label " -- Apply modif --" -w 200 -c ( "KETmodifyTag " + $shareJoints[$i] + " " + $getType + " " + $i + ";" ) ;
button -label " Select member" -w 113 -c ("select -r " + $shareJoints[$i] + ";");
button -label " Delete member" -w 112 -c ("KERdetagThem " + $shareJoints[$i] + ";");
... to exit the [$i] from the " " !!!
and double sorry, this is a reply to my old post
I didnt wanted to write a new one... I cant delete it...