<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>测试</title></head><body> <ul> <li>11</li> <li>22</li> <li id="li1">33</li> <li>44</li> <li>55</li> </ul> <script> window.οnlοad=function(){ var oLi=document.getElementById('li1'); var prev=oLi.previousElementSibling||oLi.previousSibling;//oLi.previousElementSibling与oLi.previousSibling位置不能颠倒，颠倒之后在火狐和chrome下会出错 prev.style.background='red'; } </script></body></html>
//同理 firstChild、 lastChild、nextSibing兼容性问题解决方法一样
转载于:https://www.cnblogs.com/chabai/p/5139774.html
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