function z()
{
    var tbl = document.getElementById('left_menu_content');

    var t = tbl.offsetParent.offsetTop;
    var h = tbl.offsetParent.offsetHeight;

    //setting up left menu
    document.getElementById('menu_left_menu').style.top = t;
    document.getElementById('menu_left_menu').height = h;
    document.getElementById('menu_bg_left_menu').style.height = h;

    document.getElementById('menu_left_menu_left_border').style.top = t - 40;
    document.getElementById('menu_left_menu_left_border').height = h + 40;
    document.getElementById('menu_left_border_left_menu').height = h + 40;

    document.getElementById('menu_left_menu_right_border').style.top = t - 40;
    document.getElementById('menu_left_menu_right_border').height = h + 40;
    document.getElementById('menu_right_border_left_menu').height = h + 40;


    tbl = document.getElementById('right_menu_content');

    t = tbl.offsetParent.offsetTop;
    h = tbl.offsetParent.offsetHeight;

    //setting up right menu
    document.getElementById('menu_right_menu').style.top = t;
    document.getElementById('menu_right_menu').height = h;
    document.getElementById('menu_bg_right_menu').height = h;

    document.getElementById('menu_right_menu_left_border').style.top = t - 40;
    document.getElementById('menu_right_menu_left_border').height = h + 40;
    document.getElementById('menu_left_border_right_menu').height = h + 40;

    document.getElementById('menu_right_menu_right_border').style.top = t - 40;
    document.getElementById('menu_right_menu_right_border').height = h + 40;
    document.getElementById('menu_right_border_right_menu').height = h + 40;


    tbl = document.getElementById('login_form_content');

    if(tbl != null)
    {
        t = tbl.offsetParent.offsetTop;
        h = tbl.offsetParent.offsetHeight;

        //setting up login form
        document.getElementById('menu_login_form').style.top = t;
        document.getElementById('menu_login_form').height = h;
        document.getElementById('menu_bg_login_form').height = h;

        document.getElementById('menu_login_form_left_border').style.top = t - 40;
        document.getElementById('menu_login_form_left_border').height = h + 40;
        document.getElementById('menu_left_border_login_form').height = h + 40;

        document.getElementById('menu_login_form_right_border').style.top = t - 40;
        document.getElementById('menu_login_form_right_border').height = h + 40;
        document.getElementById('menu_right_border_login_form').height = h + 40;
    }
}