function toggleMenu(objID, headerID) {
    if (!document.getElementById) return;

    if (document.getElementById(objID).className == 'mLOpen') {
        document.getElementById(objID).className = 'mL';
        document.getElementById(headerID).className = 'mH';
    } else {
        document.getElementById(objID).className = 'mLOpen';
        document.getElementById(headerID).className = 'mHOpen';
    }
}