哪里出錯了，沒有系哦啊過，css就有
?window.onload = function () {
?? ??? ??? ?var lis = document.getElementsByTagName('li');
?? ??? ??? ?for(i = 0;i<lis.length;i++){
?? ??? ??? ??? ?lis[i].onmouseover = function (){
?? ??? ??? ??? ??? ?this.className = lihover;
?? ??? ??? ??? ?}
?? ??? ??? ??? ?lis[i].onmouseout = function (){
?? ??? ??? ??? ??? ?this.className = "";
?? ??? ??? ??? ?}
?? ??? ??? ?}
?? ??? ?}
也按視頻li:hover改為.lihover就是沒有效果
2016-11-26
this.className = lihover;這個地方要加 ' ' ?就是這樣this.className = 'lihover';