abstraction.activate();
showPresentation();
	public void actionPerformed(ActionEvent e)	{		String s = (String) e.getActionCommand();		try {		   int     index = Integer.parseInt(s);		   switch (index) { 		   		case DM_VISIBLE:					abstraction.activate();					break;				case PROJECT_ITEM:					createProject();				   	break;				case DATASET_ITEM:					createDataset();					break;					   			   }// end switch  		} catch(NumberFormatException nfe) {  //impossible if IDs are set correctly 			   throw nfe;  //just to be on the safe side...		} 	}