/* COOKIE-------------------------------------------------------------------- */
function createCookie(name, value, days, path) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
  }
  document.cookie = name + '=' + value + ((days) ? '; expires=' + date.toGMTString() : '') + '; path=' + ((path) ? 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 eraseCookie(name) {
  createCookie(name, '', -1);
}