function imgimg(pagina){
window.open(pagina,'InviaMail','top=150,left=120, width=270, height=400, scrollbars=1');
}

function mia_win(pagina){
var w = 250;
var h = 400;
var l = Math.floor((screen.width-w)/2);
var t = Math.floor((screen.height-h)/2);
window.open(pagina,'Listautenti','top='+t+',left='+l+', width='+w+', height='+h+', scrollbars=1');
}

function preload() {
   if (!document.images) return;
   var wl = new Array();
   var arguments = preload.arguments;
   for (var i = 0; i < arguments.length; i++) {
    wl[i] = new Image();
    wl[i].src = arguments[i];
   }
}
preload('img/button2.png');

function get_opener(url) {
if (!opener)
  document.location.href=url;
else
  opener.location.href=url;
return false;
}