摘要: //判断是上滚还是下滚function scroll(fn) { var beforeScrollTop = document.documentElement.scrollTop || document.body.scrollTop, fn = fn || function () { }; window.addEventListener("scr... 阅读全文
posted @ 2017-03-15 15:27 陈小银 阅读(468) 评论(0) 推荐(0) 编辑