var banner=new Array()

banner[0]='<img src=images/car.jpg>'

banner[1]='<img src=images/car2.jpg>'

banner[2]='<img src=images/car3.jpg>'

banner[3]='<img src=images/car4.jpg>'

banner[4]='<img src=images/car5.jpg>'


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