js 设置浏览器滚动条是否可用

document.body.parentNode.style.overflow = "hidden";//隐藏且禁用横向纵向两个滚动条
document.body.parentNode.style.overflow = "auto";//开启横向纵向两个滚动条
document.body.parentNode.style.overflowX = "hidden";//隐藏横向滚动条
document.body.parentNode.style.overflowX = "auto";//开启横向滚动条
document.body.parentNode.style.overflowY = "hidden";//隐藏纵向滚动条
document.body.parentNode.style.overflowY = "auto";//开启纵向滚动条