I want to determine more than two fingers in enchant.js.

enchant();

window.onload=function(){
    game=newGame(STAGE_WIDTH,STAGE_HEIGHT);
    game.fps = FRAME;
    game.preload(
        CHARA_0_IMG
    );
    game.rootScene.backgroundColor="white";

    game.onload=function(){
        varscene=new GamePlayScene();

        // touch start
        game.rootScene.on('touchstart', function(e){
            drawFlg = true;
        });

        // touch move
        game.rootScene.on('touchmove', function(e){
            if(drawFlg===true) {// When it can be described
                createCircle(e.x, e.y);
            }
        });

        // touch end
        game.rootScene.on('touchend', function(e){
            drawFlg = false;
            // description number of notes
            drawNo++;
        });
    }
    game.start();
}

// a description of a circle
function createCircle(x,y){
    varball = new Sprite(10,10);
    var texture = new Surface(10,10);
    var context = texture.context;
    context.fillStyle="green";
    context.strokeStyle="green";

    context.lineWidth = 2;
    context.arc(5,5,4,0, Math.PI*2, false);
    context.fill();
    context.stroke();

    ball.image=texture;
    ball.moveBy(x,y);
    ball.destroy=false;

    game.rootScene.addChild(ball);

    if(!circleList[drawNo]){
        circuitList [drawNo] = [ ];
    }
    circuitList [drawNo].push(ball);
    drawList [drawNo] = false;

    ball.addEventListener(Event.ENTER_FRAME, function(){
        if(ball.destroy===true){
            game.rootScene.removeChild(ball);
        }
    });
}