added png's and jpg's

  # Process all bmps

  # b - border size in pixels

  b=20

  for f in *.bmp

  for f in *.bmp *.jpg *.png

  do

    #if there are no *.bmp it still runs once?!

    if [ -f $f ]; then 

#back up files

echo "-------- $0: Back Up --------"

if [ ! -d $bkp_dir ]; then mkdir $bkp_dir; fi

for f in *.stp *.dxf *.igs *.dwb *.bmp *.pdf~; 

for f in *.stp *.dxf *.igs *.dwb *.bmp *.png *.jpg *.pdf~; 

do 

  if [ -f $f ]; then mv $f $bkp_dir; fi

done