不传参数，执行默认参数，自动轮播

new bannerha("#banner1");

调整自动轮播速度和缓冲速度

new bannerha("#banner2",{ circle: true, speeds: 50, pnBtn: true, autoPlay: true, times: 1500 });

关闭自动轮播

new bannerha("#banner3",{ autoPlay: false });

关闭左右切换按钮

new bannerha("#banner4",{ pnBtn: false });

关闭底部小按钮

new bannerha("#banner5",{ circle: false });