//unobtrusive JavaScript, per le popup
// elementi con class="popup"
function popUp(winURL) {
  window.open(winURL,"popup","toolbar=0,menubar=0,scrollbars=0,resizable=0,height=245,width=290'");
}
function credits() {
  var links = document.getElementsByTagName("a");
  for (var i=0; i<links.length; i++) {
      if (links[i].className == "popup") {
      links[i].onclick = function() {
        popUp(this.getAttribute("href"));
        return false;
      }
    }
  }
}
function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            if (oldonload) {
                oldonload();
            }
            func();
        }
    }
}
function callFunctions() {
    credits();
}
addLoadEvent(callFunctions);