Running javscript programs with giac CAS support under linux
  1/ Install giac-1.1: add the line
  deb http://www-fourier.ujf-grenoble.fr/~parisse/debian/ testing main
  in the file /etc/apt/sources.list. Then run
    sudo apt-get update
  Now you can install or upgrade by running
    sudo apt-get install giac 
  
  2/ Install webkit
    sudo apt-get install libwebkit-dev
  
  3/ Copy libgiacjs.so in /usr/lib and run sudo ldconfig or run 
    export LD_LIBRARY_PATH=.
  
  4/ Run
    ./javascript -l giacjs giacjs.js
  (replace giacjs.js with your javascript)
  If it does not work, run ldd javascript and make a link in /usr/lib like this
  cd /usr/lib ; sudo ln -s libwebkitgtk-1.0.so.0 libwebkit-1.0.so.2
  
  For details how to make the interface, have a look at giacjs.i