02 2018 档案
摘要:```
var oBack = document.getElementById("back"); //回到顶部的按钮
window.onscroll = function(){ if (getScrollTop() >= 500) { oBack.style.display = "block"; }else{ oBack.style.display...
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摘要:``` (function(window, document) { function rootSize() { var screenWidth = document.documentElement.clientWidth || window.innerWidth; // console.log(sc
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