var menuobj;
    
    function changeBackgroundImage(objCell)
    {
        if (menuobj != null)
            resetBackgroundImage(menuobj);
    
        objCell.style.background = 'url(grafik/menu_bg_mouse_over.jpg)';
        objCell.style.cursor = 'hand';
        objCell.style.color = '#4A4945';
    }

    function resetBackgroundImage(objCell)
    {
        objCell.style.background = 'url(grafik/menu_bg_mouse_out.jpg)';
        objCell.style.cursor = 'default';
        objCell.style.color = '#000000';
    }  
    
    function returnObjById( id ) 
    { 
        if (document.getElementById) 
            var returnVar = document.getElementById(id); 
        else if (document.all) 
            var returnVar = document.all[id]; 
        else if (document.layers) 
            var returnVar = document.layers[id]; 
        return returnVar; 
    }