private boolean getFixedStartLocation(){
		input = startRField.getText();
		try {
			startR = Integer.parseInt(input);
			if (startR < 0 || startR >= Main.ROWS){
				startRField.requestFocus();
				return false;
			}
		} catch (Exception e) {
			startRField.requestFocus();
			return false;
		}
		input = startCField.getText();
		try {
			startC = Integer.parseInt(input);
			if (startC < 0 || startC >= Main.COLUMNS){
				startCField.requestFocus();
				return false;
			}
		} catch (Exception e) {
			startCField.requestFocus();
			return false;
		}
		return false;
	}