function SetNav(rel)
{
  var _li = document.getElementById('navigroup').getElementsByTagName('li');
  var _a;

  for(i=0;i<_li.length;i++)
  {
    if(_li[i].id == 'li' + rel)
    {
      _li[i].className = "currentnav";
      break;
    }
  }
}