how diff file in different dir

list_dir="
work_dir="
fs_folder="\screens"
nd_folder="\screens"


#cd $fs_folder
#echo `ls` > $work_dir/list_dir.txt
rm -R $work_dir

mkdir -m 755 $work_dir

for list in `cat $list_dir`
do
echo $list
cd $fs_folder\\$list
echo `ls *.jsp` > $work_dir/$list-ls.txt
for jspfile in `cat $work_dir/$list-ls.txt`
do
echo $jspfile
diff $fs_folder\\$list\\$jspfile $nd_folder\\$list\\$jspfile > $work_dir/$list-$jspfile-diff
done
done

cd $work_dir
rm *.txt