public/javascripts/yui/datatable/datatable.js
function() {
    this._unsetFirstRow();
    var elTr = this.getFirstTrEl();
    if(elTr) {
        // Set FIRST
        Dom.addClass(elTr, DT.CLASS_FIRST);
        this._sFirstTrId = elTr.id;
    }
}
function() {
    this._unsetFirstRow();
    var elTr = this.getFirstTrEl();
    if(elTr) {
        // Set FIRST
        Dom.addClass(elTr, DT.CLASS_FIRST);
        this._sFirstTrId = elTr.id;
    }
}
function ( ) { this . _unsetFirstRow ( ) ; var elTr = this . getFirstTrEl ( ) ; if ( elTr ) { // Set FIRST Dom . addClass ( elTr , DT . CLASS_FIRST ) ; this . _sFirstTrId = elTr . id ; } }
Assigns the class YAHOO.widget.DataTable.CLASS_FIRST to the first TR element
of the DataTable page and updates internal tracker.

@method _setFirstRow
@private
Assigns the class YAHOO . widget . DataTable . CLASS_FIRST to the first TR element of the DataTable page and updates internal tracker .