code: function ( n )
  	{
  		var pos = this.s.dt.oInstance.fnGetPosition( n );
  		return (this.s.dt.aoData[pos]._DTTT_selected===true) ? true : false;
  	}
docs: Check to see if a current row is selected or not
  @param {Node} n TR node to check if it is currently selected or not
  @returns {Boolean} true if select, false otherwise