function getParameterByName(name)
  {
    name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(window.location.href);
    if (results == null)
      return "";
    else
      return decodeURIComponent(results[1].replace(/\+/g, " "));
  }