Omg, again, please note that in this part:
[ $3 -lt 0 -a $(( $i+$3+1 )) -lt ${#tokens} ] && echo -n ${tokens[$(( $i+$3+1 ))]}
of the Get_Token function, the control about $(( $i+$3+1 )) is still wrong, it should be greater than -1, if I'm not wrong on this too :D
Thanks for your patience.