sed 's/http:\/\/www.dl.ac.uk\/CCP\/CCP4\/FAQ\/icons\/up.xbm/\/icons\/up.gif/' < $1 > tmp2
sed 's/http:\/\/www.dl.ac.uk\/CCP\/CCP4\/weblogo.gif/\/images/weblogo175.gif' < tmp2 > tmp3
sed 's/http:\/\/www.dl.ac.uk\/CCP\/CCP4\/main.html/\/main.html/' <tmp3>tmp4

