docs: function _fnProcessingDisplay ( oSettings, bShow )
  		{
  			if ( oSettings.oFeatures.bProcessing )
  			{
  				var an = oSettings.aanFeatures.r;
  				for ( var i=0, iLen=an.length ; i<iLen ; i++ )
  				{
  					an[i].style.visibility = bShow ? "visible" : "hidden";
  				}
  			}
  		
  			$(oSettings.oInstance).trigger('processing', [oSettings, bShow]);
  		}