function ShowSubmenu(id)
{
    document.getElementById('submenu_' + id).style.display = '';
    class_name = document.getElementById('menu_' + id).className;
    document.getElementById('menu_' + id).className = 'menu_but_selected';
    
    if (document.body.clientWidth > 773)
        body_width = document.body.clientWidth;
    else
        body_width = 773;

    left_offset = Math.round((body_width - 773) / 2 + 390);
    
    left_offset = 0;
    right_offset = 0;
    is_before_id = 1;
    for (i = 0; i < document.getElementById('menu_row').cells.length; i++)
    {
        if (document.getElementById('menu_row').cells[i].id == 'menu_td_' + id)
        {
            is_before_id = 0;
            left_offset -= document.getElementById('menu_row').cells[i - 1].offsetWidth;
            right_offset += document.getElementById('menu_row').cells[i - 1].offsetWidth;
        }
        
        if (is_before_id == 1)
            left_offset += document.getElementById('menu_row').cells[i].offsetWidth;
        else
            right_offset += document.getElementById('menu_row').cells[i].offsetWidth;
    }
    if (right_offset >= 202)
        document.getElementById('submenu_' + id).style.left = left_offset;
    else
    {
        if (navigator.appName == 'Microsoft Internet Explorer')
            document.getElementById('submenu_' + id).style.left = left_offset - (200 - right_offset);
        else
            document.getElementById('submenu_' + id).style.left = left_offset - (202 - right_offset);
    }
}

function HideSubmenu(id)
{
    document.getElementById('submenu_' + id).style.display = 'none';
    document.getElementById('menu_' + id).className = class_name;
}