/**
  *	@singleton method used to instantiate class object
  *	@access public
  *	@return EEH_HTML
  */
 public static function instance()
 {
     // check if class object is instantiated, and instantiated properly
     if (!self::$_instance instanceof EEH_HTML) {
         self::$_instance = new EEH_HTML();
     }
     return self::$_instance;
 }