var mess = new Array(
'<a href=\"http://www.7daynet.net/adultes\" target=\"_blank\"><img src=\"http://www.7daynet.info/pub/125-1.gif\" </a>',
'<a href=\"http://www.7daynet.info/adultes\" target=\"_blank\"><img src=\"http://www.7daynet.info/pub/125-4x.JPG\" </a>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);