function toggleMenu(mode) {
    var menu = document.getElementById('subMenuCon');
    if (mode == true) {
        menu.style.display = 'block';
    } else {
        menu.style.display = 'none';
    }
}

function setupNav() {
    var menu = document.getElementById('subMenuCon');
    var tableW = 750;
    var windowW;
    var marginW;

    //position the drop-down menus
    if (document.all) { windowW = document.body.offsetWidth; } else { windowW = window.innerWidth; }
    //alert(parseFloat(((windowW - tableW) / 2)));
    marginW = parseFloat(((windowW - tableW) / 2));
    menu.style.left = (parseFloat(marginW) + 375) + 'px';
    //alert((parseFloat(marginW) + 375) + 'px');
}