for (var i = 0; i < rows.length; i++) {
var el = rows[i];
el.style.display = el.className.match(showclass) ? 'block' : 'none';
}
// update H2 to reflect the first part of a currently active (but hidden) row header
for (var i = 0; i < rows.length; i++) {
var el = rows[i];
el.style.display = el.className.match(showclass) ? 'block' : 'none';
}
// update H2 to reflect the first part of a currently active (but hidden) row header