var mess = new Array('<a href="illustration/illustration.html"><img src="ill1.jpg" width="300" height="300" /></a>','<a href="illustration/illustration.html"><img src="ill2.jpg" width="300" height="300" /></a>','<a href="illustration/illustration.html"><img src="ill3.jpg" width="300" height="300" /></a>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);// JavaScript Document// JavaScript Document