var mess = new Array
('<a href="index.html"><img src="img/IMG_5143bluecrop2.jpg" alt="Peel P50s, Isle of Man" width="900" height="100" border="0"></a>',
'<a href="index.html"><img src="img/IMG_5143redcrop2.jpg" alt="Peel P50s, Isle of Man" width="900" height="100" border="0"></a>',
'<a href="index.html"><img src="img/IMG_5143yellowcrop2.jpg" alt="Peel P50s, Isle of Man" width="900" height="100" border="0"></a>'
);
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);