//usata per credits
function popup(url,w,h,sc) {

var l = (screen.width) ? (screen.width-w)/2 : 0; 
var t = (screen.height) ? (screen.height-h)/2 : 0;
pag=url;
if (navigator.appName != 'Microsoft Internet Explorer') 
str="screenX="+l+",screenY="+t+",outerWidth="+w+",outerHeight="+(h+30)+",status=no,toolbar=no,menubar=no,location=yes"+ sc;
 
else str="left="+l+",top="+t+",width="+w+",height="+h+",status=no,toolbar=no,menubar=no,location=no,scrollbars="+ sc; 

//window.open (pag,'open', str);

var mostra = window.open (pag,'open', str);
mostra.focus();

}


function pop_up(alt,larg,pag) {

alto=Math.floor((screen.height-alt)/2);
sini=Math.floor((screen.width-larg)/2);
fin=window.open(pag,"","width="+larg+",height="+alt+",top="+alto+",left="+sini+",resizable=no,scrollbars=no")

}

//per i rollover
function SwapImage(ImageName,ImageFile)
{
	Image1=new Image(75,50);
	Image1.src = ImageFile;
	document[ImageName].src = Image1.src; return true;
}