docs: function _update_value(inkey, intype, inval){
  
  	// Update the value in question.
  	var rval = false;
  	if( typeof anchor.current_data[inkey] != 'undefined' &&
  	    typeof anchor.current_data[inkey][intype] != 'undefined' ){
  		anchor.current_data[inkey][intype] = inval;
  		rval = true;
  		// ll("\tupdated: " + inkey +
  		// 	    "'s " + intype +
  		// 	    ' to ' + inval);
  	    }
  
  	// Bookkeeping to keep the "no filter" option selected
  	// or not in all cases.
  	if( _get_selected_items().length == 0 ){
  	    anchor.current_data['_nil_']['selected'] = true;	    
  	}else{
  	    anchor.current_data['_nil_']['selected'] = false;
  	}
  
  	return rval;
      }