function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
<!--
checkbr = (parseInt(navigator.appVersion) > 2)?true:false;
if (checkbr)
{
	nome = new Array ("cartina_pop_1","cartina_pop_2","cartina_pop_3","cartina_pop_4")
	source = new Array ();
	for (conta in nome)
	{
		source[conta] = new Image();
		source[conta].src = "images/"+nome[conta]+".jpg";
	}
	vuoto = new Image(); 
	vuoto.src="images/cartina_pop_4.jpg";
	
	source_2 = new Array ();
	source_2[0] = new Image();
	source_2[1] = new Image();

	source_2[0].src = "images/FFF3CD.gif";
	source_2[1].src = "images/E49752.gif";
}

function swp(numero)
{
	if (checkbr)
	{
		document.roller.src=source[numero].src;
		switch(numero) { 
		
		case 0: 
			document.puls_1.src=source_2[1].src;
			document.puls_2.src=source_2[0].src;
			document.puls_3.src=source_2[0].src;
			document.puls_4.src=source_2[0].src;
		break; //si ferma qui 
		
		case 1: 
			document.puls_1.src=source_2[0].src;
			document.puls_2.src=source_2[1].src;
			document.puls_3.src=source_2[0].src;
			document.puls_4.src=source_2[0].src;
		break; //si ferma qui 
		
		case 2: 
			document.puls_1.src=source_2[0].src;
			document.puls_2.src=source_2[0].src;
			document.puls_3.src=source_2[1].src;
			document.puls_4.src=source_2[0].src;
		break; //si ferma qui 
		
		case 3: 
			document.puls_1.src=source_2[0].src;
			document.puls_2.src=source_2[0].src;
			document.puls_3.src=source_2[0].src;
			document.puls_4.src=source_2[1].src;
		break; //si ferma qui 
		
		default: 
			document.puls_1.src=source_2[0].src;
			document.puls_2.src=source_2[0].src;
			document.puls_3.src=source_2[0].src;
			document.puls_4.src=source_2[1].src;
		}		
	}
}
//-->