function random_content(){
var mycontent=new Array()
//specify random content below.
mycontent[1]='<iframe src="http://www.favorisxp.com/adserver/regies/criteo/180x150-crite-emplacement-toutes-pages.html" width="180" height="150" frameborder="0" scrolling="no"></iframe>'/* 180x150 criteo */
var ry=Math.floor(Math.random()*mycontent.length)
if (ry==0)
ry=1
document.write(mycontent[ry])
}
random_content()