#!/bin/sh

for i in `ls *.jpg | sed -e "s/\(^.*\)\..*$/\1/"`; do
mv $i".jpg" $i"_TH.jpg"
done

for i in `ls *.gif | sed -e "s/\(^.*\)\..*$/\1/"`; do
mv $i".gif" $i"_TH.gif"
done