var mess = new Array('<img src="images/headrafting.jpg" name="r_img" alt="Random image" width="750" height="250" />','<img src="images/headrafting4.jpg" name="r_img" alt="Random image" width="750" height="250" />','<img src="images/headrafting3.jpg" name="r_img" alt="Random image" width="750" height="250" />','<img src="images/headrafting2.jpg" name="r_img" alt="Random image" width="750" height="250" />');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);