求助，为什么click事件没有反应

为什么点击圆圈不能弹出第几个圆圈的标记

解决方案 »

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click拼错了吧
getElementsByTagName是多个的所以要加下标window.onload = function(){
Li = document.getElementsByTagName("div")[0].getElementsByTagName("li");
LiLength = Li.length;
for(let i=0;i<LiLength;i++){
Li[i].index = i;
Li[i].onclick = function(){
var index = this.index;
alert(index);
};
}
}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>

        *{
            margin: 0;
            padding: 0;
        }
        div{
            height:100px;
            width: 550px;
            border:1px solid black;
            line-height: 100px;
            position: relative;
        }
        li{
            border:1px solid black;
            list-style: none;
            display: block;
            height: 100px;
            width: 100px;
            border-radius:50px 50px;
            float: left;
        }
    </style>
    <script>
        window.onload = function(){
            Li = document.getElementsByTagName("div").getElementsByTagName("li");
            Lilength = Li.length;
            for(let i =0;i<Lilength;i++){
                Li[i].index = i;
                Li[i].onclick = function(){
                    var index = this.index;
                    alert(index);
            }
        }
        }

    </script>
</head>
<body>
    <div>
      <ul>
       <li class="round"></li>
       <li class="round"></li>
       <li class="round"></li>
       <li class="round"></li>
       <li class="round"></li>
    </ul>
    </div>
</body>
</html>
li[i].onclink= function()是这个问题么