private static function _ponerColor() { self::$_color = isset($_SESSION['color']) ? $_SESSION['color'] : ''; if (self::$_color == 'rojo') { self::$_estilo = "<style type=\"text/css\">body{ color: red; }</style>\n"; } elseif (self::$_color == 'azul') { self::$_estilo = "<style type=\"text/css\">body{ color: blue; }</style>\n"; } elseif (self::$_color == 'verde') { self::$_estilo = "<style type=\"text/css\">body{ color: green; }</style>\n"; } }