if(navigator.userAgent.indexOf("MSIE")>0){
 // alert(navigator.userAgent+"ho scritto qui");
 function swap_bgie(){
  // alert(navigator.userAgent+"ho scritto qui");
  var randnum=Math.round(Math.random()*6)+1;
  if(randnum==controlpos){
 var randnum=Math.round(Math.random()*6)+1;
  }
  var controlpos=randnum;
 //document.getElementById('search').setAttribute("style","background:url('/portale/images/photo_"+randnum+".jpg') no-repeat center");
  document.getElementById('schermo').innerHTML="<img width=\"100\" src=\"/portale/images/photo_"+randnum+".jpg\"/>";
 //document.getElementById('schermo').value=randnum;
  t=setTimeout("swap_bgie()",10000);
  }
 swap_bgie();
  }else{
   //  alert(navigator.userAgent+"ho scritto qui");
var t;
var controlpos;
function swap_bg(){
  var randnum=Math.round(Math.random()*6)+1;
  if(randnum==controlpos){
 var randnum=Math.round(Math.random()*6)+1;
  }
  var controlpos=randnum;
  //alert(randnum);
  fade_bg(0);
  //document.getElementById('search').setAttribute("style","background:none");
document.getElementById('search').setAttribute("style","background:url('/portale/images/photo_"+randnum+".jpg') no-repeat center");
 //document.getElementById('schermo').innerHTML="<img width=\"100\" src=\"/portale/images/photo_"+randnum+".jpg\"/>";
// document.getElementById('schermo').value=randnum;
 t=setTimeout("swap_bg()",10000);
}
function fade_bg(amt) {
	if(amt <= 100) {
		setFade_bg(amt);
		amt += 10;
		setTimeout("fade_bg("+amt+")", 5);
    }
}

function setFade_bg(amt) {

	obj = document.getElementById("search");

	amt = (amt == 100)?99.999:amt;

	// IE
	obj.style.filter = "alpha(opacity:"+amt+")";

	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = amt/100;

	// Mozilla and Firefox
	obj.style.MozOpacity = amt/100;

	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = amt/100;
}
swap_bg();
}