 <!-- 
function showTip(obj) 
{   if  (document.layers) 
    {   if  (document.layers[obj] != null) document.layers[obj].visibility = 'visible';
    }
    else 
    if  (document.all) document.all[obj].style.visibility = 'visible';
}
 
function hideTip(obj) 
{   if  (document.layers) 
    {   if (document.layers[obj] != null) document.layers[obj].visibility = 'hidden';
    }
    else 
    if  (document.all)
        document.all[obj].style.visibility = 'hidden';
}
//  -->