YUI DataTable: Context Menu with “Select/Unselect All” rows

Andy from Coderfoo.com created this excellent example and code sniplet to demo a function he created that uses a context menu to select and deselect all rows from a YUI datatable. At first I simply thought he was just accessing a regular function within YUI but he soon corrected me. He explained that while YUI has a deselect function for all rows a select all function did not exist. So knowing Andy he took on the challenge of creating this function. Thanks again Andy for sharing your code with us.
Working Example on CoderFoo.com http://www.coderfoo.com/examples/datatable-multi-row-select.html

Get the code

YAHOO.lang.augmentObject(
  YAHOO.widget.DataTable.prototype, {
    _selectAllTrEls : function() {
      var selectedRowsEven = YAHOO.util.Dom.getElementsByClassName(YAHOO.widget.DataTable.CLASS_EVEN, "tr",this._elTbody);
      YAHOO.util.Dom.addClass( selectedRowsEven , YAHOO.widget.DataTable.CLASS_SELECTED);
      var selectedRowsOdd = YAHOO.util.Dom.getElementsByClassName(YAHOO.widget.DataTable.CLASS_ODD, "tr",this._elTbody);
      YAHOO.util.Dom.addClass( selectedRowsOdd, YAHOO.widget.DataTable.CLASS_SELECTED);
    },
  /* Selects all rows. * * @method selectAllRows */
  selectAllRows : function() {
    // Remove all rows from tracker
    var tracker = this._aSelections || [];
    for(var j=tracker.length- 1; j>-1; j--) {
      if(YAHOO.lang.isString( tracker[j] )){
        tracker.splice( j,1);
      }
    }
    // Update tracker
    this._aSelections = tracker;
    // Update UI
    this._selectAllTrEls();
    // Get all highlighted rows and make yahoo aware they are selected
    var selectedRowsEven = YAHOO.util.Dom.getElementsByClassName(YAHOO.widget.DataTable.CLASS_SELECTED, "tr",this._elTbody);
    for (i=0;i
<selectedRowsEven.length; i++){
      this.selectRow(i);
    }
  }
});