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 = "fr";}

  if (lang_off == notdefined) {lang_off = "en";}

  language(lang_on,lang_off);

}


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