function setTopNavSiteMapLinkBorder( strTdId, fIsHover, strTdClassSelected, strTdClassUnselected )
{

    if ( ! document.getElementById || 'undefined' == typeof( document.getElementById ) )
        return;

    var tdCell = document.getElementById( strTdId );

    if ( 'undefined' == typeof(tdCell ) || null == tdCell || 'undefined' == typeof( tdCell.className ) )
        return;

    if ( fIsHover )
        tdCell.className = strTdClassUnselected;

    else
        tdCell.className = strTdClassSelected;

}