摘要:
HTML:CSS:*{ margin: 0; padding: 0;}#btn1{ position: fixed; bottom: 0; right: 0; padding: 10px 20px;}JS:window.onload=function(){ var oBnt = document.getElementById('btn1'); var timer = null; var bSys = true; /* 检测是否为用户滚动或者为系统自身滚动 */ window.onscroll=function(){ ... 阅读全文