var mess = new Array(	'<A HREF="http://www.imaging.beckman.illinois.edu/areas/biomedical.html"><img src="./focusbar/eros.jpg"></img></a>', 
			'<A HREF="http://www.imaging.beckman.illinois.edu/areas/agents.html"><img src="./focusbar/f18_pet.jpg"></img></a>', 
			'<A HREF="http://www.imaging.beckman.illinois.edu/areas/artshumanities.html"><img src="./focusbar/industrial_design.jpg"></img></a>', 
			'<A HREF="http://www.imaging.beckman.illinois.edu/areas/computational.html"><img src="./focusbar/poliovirus.jpg"></img></a>');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);