function bbmm_expand(section)
        {
            // set image locations
            var arrow_right = 'url(images/arrow_right.png)';
            var arrow_down =  'url(images/arrow_down.png)';

            // set id's
            var title_id = section + '_title';
            var options_id = section + '_options';
            var wrapper_id = section + '_wrapper';

            // toggle selection font-weight
            if (document.getElementById(title_id).style.fontWeight == 'bold')
            {
                document.getElementById(title_id).style.fontWeight = 'normal';
            }
            else
            {
                document.getElementById(title_id).style.fontWeight = 'bold'
            }

            // toggle direction arrow
            var wrapper_elem = document.getElementById(wrapper_id);
            if (wrapper_elem.style.backgroundImage.indexOf('arrow_down.png') > 0)
            {
                wrapper_elem.style.backgroundImage = arrow_right;
            }
            else
            {
                wrapper_elem.style.backgroundImage = arrow_down;
            }

            // toggle options view
            var options_elem = document.getElementById(options_id);
            if (options_elem.style.display == 'block')
            {
                options_elem.style.display = 'none';
            }
            else
            {
                options_elem.style.display = 'block';
            }
        }