var mess = new Array('<img src="Images/Header-one.jpg" class="Image-top" alt="">','<img src="Images/Header-two.jpg"  class="Image-top" alt="">','<img src="Images/Header-three.jpg"  class="Image-top" alt="">','<img src="Images/Header-four.jpg"  class="Image-top" alt="">','<img src="Images/Header-seven.jpg"  class="Image-top" alt="">','<img src="Images/Header-six.jpg"  class="Image-top" alt="">','<img src="Images/Header-five.jpg"  class="Image-top" alt="">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);