function showTips(nm){
var style=document.getElementById?
document.getElementById(nm).style:(
document.all?document.all(nm).style:(
document.layers?document.layers[nm]:null
                  )
              );
if(style) style.visibility='inherit';
}
function hideTips(nm){
var style=document.getElementById?
document.getElementById(nm).style:(
document.all?document.all(nm).style:(
document.layers?document.layers[nm]:null
                  )
              );
if(style) style.visibility='hidden';
}