// JavaScript Document
var id="headfoto";
var imgArray=new Array("image/headfoto/headfoto01.jpg","image/headfoto/headfoto02.jpg","image/headfoto/headfoto03.jpg",
"image/headfoto/headfoto04.jpg","image/headfoto/headfoto05.jpg","image/headfoto/headfoto06.jpg", "image/headfoto/headfoto07.jpg",
"image/headfoto/headfoto08.jpg");

// da qui in poi non sono necessarie modifiche

if(document.getElementById) MakeHeader();

function MakeHeader(){
var el=document.getElementById(id);
if(el) el.style.background="url("+RandomImage()+")";
else setTimeout("MakeHeader()",100);
}

function RandomImage(){
return(imgArray[Math.round(Math.random()*(imgArray.length-1))]);
}