不传参数，执行默认参数，鼠标点击预览图切换

new accordion("#accordion");

执行默认参数，设置横向展开{direction: "x"}，设置隐藏体可是区大小{expose: 50}默认单位为px，鼠标点击预览图切换

new accordion("#accordion1", { direction: "x", expose: 50 });

执行默认参数，设置纵向展开{direction: "y"}，设置隐藏体可是区大小{expose: 30}默认单位为px，鼠标点击预览图切换

new accordion("#accordion2", { direction: "y", expose: 30 });

执行默认参数，设置纵向展开{direction: "y"}，设置隐藏体可是区大小{expose: 30}默认单位为px，设置运动速度{speed: 100}，鼠标点击预览图切换

new accordion("#accordion3", { direction: "y", expose: 30, speed: 100 });