//<!--
            //<![CDATA[
            
            first = 1;
            last = 13;
            current = 1;
            
            function nextPicture() {
                // Hide current picture
                object = document.getElementById('slide' + current);
                object.style.display = 'none';
                
                // Show next picture, if last, loop back to front
                if (current == last) { current = 1; }
                else { current++ }
                object = document.getElementById('slide' + current);
                object.style.display = 'block';
            }

            function previousPicture() {
                // Hide current picture
                object = document.getElementById('slide' + current);
                object.style.display = 'none';
                
                if (current == first) { current = last; }
                else { current--; }
                object = document.getElementById('slide' + current);
                object.style.display = 'block';
            }
            //]]>
            // -->