function alberghi_ospitando(url_pop) {
	var PopWidth=400;
    var PopHeight=300;
    var PopLeft = (window.screen.width-PopWidth)/2;
    var PopTop = (window.screen.height-PopHeight)/2;
    ospitando=window.open('popup.asp?nomefile='+url_pop,'ospitando','toolbar=no,status=no,menubar=no,location=no,directories=no,resizable=no,scrollbars=no,width='+PopWidth+',height='+PopHeight+',top='+PopTop+',left='+PopLeft);
}