function random_content(){
var mycontent=new Array()
//specify random content below.
mycontent[1]='<img src="image/img01.jpg">'
mycontent[2]='<img src="image/img02.jpg">'
mycontent[3]='<img src="image/img03.jpg">'


var ry=Math.floor(Math.random()*mycontent.length)
if (ry==0)
ry=1
document.write(mycontent[ry])
}
random_content()