// JavaScript Document
<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
<!-- 
function image() { 
}; 

image = new image(); 
number = 0; 
// imageArray 
image[number++] = "<img src='/img/thun01.jpg'>"
image[number++] = "<img src='/img/thun02.jpg'>" 
image[number++] = "<img src='/img/thun03.jpg'>" 
image[number++] = "<img src='/img/thun04.jpg'>" 
image[number++] = "<img src='/img/thun05.jpg'>" 
image[number++] = "<img src='/img/thun06.jpg'>" 

// Aggiungere qui altre immagini.... 

increment = Math.floor(Math.random() * number); 

//-->