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";
    }
  }
}

function startlanguage() {
  var notdefined;
  var lang_on = readCookie("langue_on");
  var lang_off = readCookie("langue_off");
  if (lang_on == notdefined) {lang_on = "si";}
  if (lang_off == notdefined) {lang_off = "en";}
  language(lang_on,lang_off);
}

window.onload = function () {startlanguage();}