html禁止页面滑动事件,在html5 canvas touchmove事件期间阻止滚动

如何在不阻止默认情况下阻止滚动,因为我仍然希望处理touchmove事件：

function brushStart() {

$('#myCanvas').css('background-color','blue');

}

function brushEnd() {

$('#myCanvas').css('background-color','red');

}

function brushMove() {

$('#myCanvas').css('background-color','yellow');

}

$('#myCanvas').bind('mousedown', brushStart);

$('#myCanvas').bind('mouseup', brushEnd);

$('#myCanvas').bind('mousemove', brushMove);

$('#myCanvas')[0].addEventListener('touchstart',brushStart,false);

$('#myCanvas')[0].addEventListener('touchend',brushEnd,false);

$('#myCanvas')[0].addEventListener('touchmove',brushMove,false);