var g_visibleitem = null;
function showNews(index)
{
    if(g_visibleitem==null)
    {
        g_visibleitem=document.getElementById("0");
    }
    var item = document.getElementById(index);
    if(g_visibleitem !=null)
    {
        g_visibleitem.style.display = "none";
    }
    g_visibleitem=item;
    item.style.display="block";
}