function createCookie(name,value,days) {
        if (days) {
          var date = new Date();
          date.setTime(date.getTime()+(days*24*60*60*1000));
          var expires = "; expires="+date.toGMTString();
        }
        else expires = "";
        document.cookie = name+"="+value+expires+"; path=/";
      }
       
      function readCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i <ca.length;i++) {
          var c = ca[i];
          while (c.charAt(0)==' ') c = c.substring(1,c.length);
          if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
      }
       
      function language(lang_on, lang_off) {
        createCookie("langue_on",lang_on,365);
        createCookie("langue_off",lang_off,365);
          for (var i=0; i<document.getElementsByTagName("div").length; i++ ) {
            if (document.getElementsByTagName("div")[i].lang == lang_on) {
              document.getElementsByTagName("div")[i].style.display="block";
            }
            if (document.getElementsByTagName("div")[i].lang == lang_off) {
              document.getElementsByTagName("div")[i].style.display="none";
            }
          }
          for (var i=0; i<document.getElementsByTagName("span").length; i++ ) {
            if (document.getElementsByTagName("span")[i].lang == lang_on) {
              document.getElementsByTagName("span")[i].style.display="inline";
            }
            if (document.getElementsByTagName("span")[i].lang == lang_off) {
              document.getElementsByTagName("span")[i].style.display="none";
            }
          }
      }
       
      function startlanguage() {
        var notdefined;
        var lang_on = readCookie("langue_on");
        var lang_off = readCookie("langue_off");
        if (lang_on == notdefined) {lang_on = "it";}
        if (lang_off == notdefined) {lang_off = "en";}
        language(lang_on,lang_off);
      }
       
      window.onload = function () {startlanguage();}