[jason_kelly]

Like this?

nu = nu + 1

function GoTo(id,nu){
  var obj=document.getElementById(id),trs=obj.getElementsByTagName('TR');;
  nu = nu + 1
  if (trs[nu]){
   if (GoTo.lst&&GoTo.lst!=trs[nu]){
    GoTo.lst.className='';
   }
   trs[nu].className = trs[nu].className=="highlighted" ? "" : "highlighted";
   GoTo.lst=trs[nu];
  }
 }