lovecoding
/
W260426


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        li{
            list-style: none;
        }
        .clearfix::after{
            content: "";
            display: block;
            clear: both;
        }
        .content{
            width: 500px;
            border:2px solid #999;
            margin:100px auto;
            text-align: center;
        }
        .big-img img{
            width: 400px;
            height: 300px;
        }
        .small-img{
            border-top:2px solid #999;  
        }
        .small-img img{
            width: 100px;
            height: 80px;
        }
        .small-img ul li{
            float: left;
            border-right: 2px solid #999;
            width: 125px;
            box-sizing: border-box;
            text-align: center;
        }
        .small-img ul li:last-child{
            border-right: 0;
        }
    </style>
</head>
<body>
    <div class="content">
        <div class="big-img">
            <img id="bigImg" src="./img/phone.png" alt="phone">
        </div>
        <div class="small-img">
            <ul class="clearfix">
                <li><img src="./img/phone.png" alt="phone"></li>
                <li><img src="./img/phone2.png" alt="phone2"></li>
                <li><img src="./img/ad1.jpg" alt="ad1"></li>
                <li><img src="./img/ad2.png" alt="ad2"></li>
            </ul>
        </div>
    </div>
    <script>
        // 获取元素
        var bigImg = document.getElementById("bigImg");
        // var smallImgs = document.getElementsByClassName("small-img")[0].getElementsByTagName("img");
        var smallImgs = document.querySelectorAll(".small-img img");

        // smallImgs[0].onmouseover = function(){
        //     var thisSrc = smallImgs[0].getAttribute("src");
        //     bigImg.setAttribute("src",thisSrc);
        // }
        // smallImgs[1].onmouseover = function(){
        //     var thisSrc = smallImgs[1].getAttribute("src");
        //     bigImg.setAttribute("src",thisSrc);
        // }
        // smallImgs[2].onmouseover = function(){
        //     var thisSrc = smallImgs[2].getAttribute("src");
        //     bigImg.setAttribute("src",thisSrc);
        // }
        // smallImgs[3].onmouseover = function(){
        //     var thisSrc = smallImgs[3].getAttribute("src");
        //     bigImg.setAttribute("src",thisSrc);
        // }

        // 循环遍历smallImgs数组
        for(var i=0;i<smallImgs.length;i++){
            smallImgs[i].onmouseover = function(){
                // console.log("鼠标移入");
                console.log(i);
                // var thisSrc = smallImgs[i].getAttribute("src");
                var thisSrc = this.getAttribute("src");
                bigImg.setAttribute("src",thisSrc);
            }
        }
    </script>
</body>
</html>