var mainimage=new Array()


mainimage[0]='<img src="images/home_image1.jpg">'

mainimage[1]='<img src="images/home_image2.jpg">'

mainimage[2]='<img src="images/home_image3.jpg">'

mainimage[3]='<img src="images/home_image4.jpg">'

var whichimage=Math.floor(Math.random()*(mainimage.length))
document.write(mainimage[whichimage])