<div class="xzlian">
<div class="nei">
<a href="javascript:" class="aa con">1.创建角色</a>
<a href="javascript:" class="aa">2.进入新手教程</a>
<a href="javascript:" class="aa">3.快速游戏</a>
</div>
<div class="nei_img" style="display: block">
<img src="res/img/intro1_1.jpg" alt="">
<img src="res/img/intro1_2.jpg" alt="">
<img src="res/img/intro1_3.jpg" alt="">
</div>
<div class="nei_img" style="display: none">
<img src="res/img/intro2_1.jpg" alt="">
</div>
<div class="nei_img" style="display: none">
<img src="res/img/intro3_1.jpg" alt="">
</div>
</div>
</div>
var aa = document.getElementsByClassName('aa'); 声明一个变量aa 是为了找到需要点击的按钮
var nei = document.getElementsByClassName('nei_img'); 声明一个变量nei 找到需要显示隐藏的内容
for (var i=0;i<aa.length;i++){
aa[i].index=i;
aa[i].onclick = function () {
for (var i=0;i<aa.length;i++){
aa[i].className = 'aa';
nei[i].style.display = 'none';
}
this.className = 'aa con';
nei[this.index].style.display='block';
}
}