function switchMenu(elBoxMenu) {

        var elBoxMenues = getElementsByClassName("boxMenu");
        var elSubMenues = getElementsByClassName("subMenu");
        var elImgMenues = getElementsByClassName("imgMenu");

        for (i=0; i<elBoxMenues.length; i++) {

            if (elBoxMenues[i]==elBoxMenu) {
                elBoxMenues[i].className='boxMenu menu_tlo1a';
                if (elSubMenues[i].className == 'subMenu block')
                    elSubMenues[i].className = 'subMenu none';
                else
                    elSubMenues[i].className='subMenu block';
                elImgMenues[i].src="images/menu/menu_spac_folder.gif";
            } else {
                elBoxMenues[i].className='boxMenu menu_tlo1b';
                elSubMenues[i].className='subMenu none';
                elImgMenues[i].src = "images/menu/menu_spac_file.gif";
            }
        }
    }