function Ricerca(url) {
var w = 600;
var h = 400;
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
  popupWin = window.open(url,'new_page','width='+w+',height='+h+',top='+wint+',left='+winl+',scrollbars=yes,resizable=no,toolbar=no,location=no,directories=no,status=no,menubar=no')
}