ble box
        * @param buttonObj Button controlling box
        */
        function openBox(boxObj, buttonObj) {
            if (boxObj == null || buttonObj == null) {
                // Box or button not found
            } else {
                // Change 'display' CSS property of box
                boxObj.style.display = "block";
                
                // Change text of button
                if (boxObj.style.display == "block") {
                    buttonObj.src = "img/btM.gif";
          