, 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";
                }
            }
        }
        
        /**
        * Closes a collapseable box.
        *
