function goto(url,dlugosc,szerokosc) {
    var width = dlugosc;
    var height = szerokosc;
    var left = 0;
    var top = 0;
    var windowFeatures = "width=" + width + ",height=" + height + 
        ",status,resizable,scrollbars=true,left=" + left + ",top=" + top + 
        ",screenX=" + left + ",screenY=" + top;
    myWindow = window.open(url, "subWind");
}


function menu_on(co){
co.className='menu_on';

}

function menu_off(co){
co.className='menu_off';
}