function games_600x600(tracking_link){ 
//altURL = 'http://www.jamba.fr/jcw/go/';
document.writeln('<a href=\"'+tracking_link+'\" target=\"_blank\">');
document.writeln('<img src=\"http://ad.jamba.fr/creatives/default/specials/emailing//games_600x600.gif\" width=\"600\" height=\"600\" border=\"0\"></a>');
}