var mess = new Array('<img src="images/ADVERTS_commercial_business.jpg" width="167" height="101">','<img src="images/ADVERTS_motor_fleet.jpg" width="167" height="101">','<img src="images/ADVERTS_haulage_fleet.jpg" width="167" height="101">','<img src="images/ADVERTS_van.jpg" width="167" height="101">','<img src="images/ADVERTS_hgv.jpg" width="167" height="101">','<img src="images/ADVERTS_employers_liability.jpg" width="167" height="101">','<img src="images/ADVERTS_Combined_liability.jpg" width="167" height="101">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);