function toggleHelp(x) {
        if ((document.getElementById(x).style.display == 'block') && (document.getElementById(x).style.visibility == 'visible')) {
                document.getElementById(x).style.display = 'none';
                document.getElementById(x).style.visibility = 'hidden';
        } else {
                document.getElementById(x).style.display = 'block';
                document.getElementById(x).style.visibility = 'visible';
        }
}