function menu_over(index)
    {
    if(document.getElementById('menu_pic_'+index))
        {
        var div=document.getElementById('menu_pic_'+index);
        div.style.zIndex='10';
        div.style.backgroundImage = "url("+des_url+"img/pic"+index+"_2.gif)";
        }
    }

function menu_out(index)
    {
    if(document.getElementById('menu_pic_'+index))
        {
        var div=document.getElementById('menu_pic_'+index);
        div.style.zIndex='5';
        div.style.backgroundImage = "url("+des_url+"img/pic"+index+"_1.gif)";
        }
    }
    
function unhighlight()
    {
    var menu_holder=document.getElementById('main_menu');
    menu_holder.cells[0].style.backgroundImage='url('+des_url+'img/menu_left.jpg)';
    var i=1;
    while(menu_holder.cells[i])
        {
        menu_holder.cells[i].style.backgroundImage='';
        i++;
        }
    }

function menu_highlight(index)
    {
    unhighlight();
    var menu_holder=document.getElementById('main_menu');
    if(menu_holder.cells[index])
        {
        menu_holder.cells[index].style.backgroundImage='url('+des_url+'img/menu_act_bg.jpg)';
        if(index==1)
            {
            menu_holder.cells[0].style.backgroundImage='url('+des_url+'img/menu_act_left.jpg)';
            }
        }
    }