/*µ¼º½²Ëµ¥*/
function fetch_object(idname)
{
    var my_obj = document.getElementById(idname);
    return my_obj;
}
function toggle_nav(obj)
{
    for (i = 1; i<= 8; i++  )
    {
        
        var nav_img = fetch_object("nav_" + i);
        var sub_nav = fetch_object("sub_nav_" + i);
        var sub_nav_index =  fetch_object("sub_nav_0");
        sub_nav_index.style.display = "none";
        if (obj == i)
        {
            nav_img.src = "Img/nav_" + i + "_on.gif";
            sub_nav.style.display = "block";
        }
        else
        {
            nav_img.src = "Img/nav_" + i + "_off.gif";
            sub_nav.style.display = "none";
        }
    }
}
/*»¬¶¯ÃÅ*/
function g(o){return document.getElementById(o);}
function HoverLi(n)
{for(var i=1;i<=3;i++){g('tb_'+i).className='normaltab';g('tbc_0'+i).className='undis';}g('tbc_0'+n).className='dis';g('tb_'+n).className='hovertab';}