var banner=new Array()

banner[0]='<img src="images/atoll.jpg" alt="randomised banner image" width="600" height="200" />'

banner[1]='<img src="images/ocean_road.jpg" alt="randomised banner image" width="600" height="200" />'

banner[2]='<img src="images/pigeonhouse.jpg" alt="randomised banner image" width="600" height="200" />'

banner[3]='<img src="images/seafloor.jpg" alt="randomised banner image" width="600" height="200" />'

banner[4]='<img src="images/noflash2.jpg" alt="randomised banner image" width="600" height="200" />'

banner[5]='<img src="images/ship.jpg" alt="randomised banner image" width="600" height="200" />'

banner[6]='<img src="images/villarica.jpg" alt="randomised banner image" width="600" height="200" />'

banner[7]='<img src="images/banner1.jpg" alt="randomised banner image" width="600" height="200" />'

banner[8]='<img src="images/banner2.jpg" alt="randomised banner image" width="600" height="200" />'

banner[9]='<img src="images/laseronglass.jpg" alt="randomised banner image" width="600" height="200" />'

banner[10]='<img src="images/lasersem.jpg" alt="randomised banner image" width="600" height="200" />'

var whichbanner=Math.floor(Math.random()*(banner.length))
document.write(banner[whichbanner])