var ClassSwitcher =
{
  init: function()
  {
    var hiddenElements = Core.getElementsByClass("javascriptoff");
    for (var i = 0; i < hiddenElements.length; i++)
    {
        Core.removeClass(hiddenElements[i], "javascriptoff");
        Core.addClass(hiddenElements[i], "javascripton");
    }
  }
};

Core.start(ClassSwitcher);