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45 图片切换练习

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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>
        #outer{
            text-align: center;
            margin: 0px auto;
            width: 500px;
            padding: 5px;
            background-color: beige;
        }
        #prev,#next{
            margin-top: 5px;
            padding: 10px;
            width: 130px;
            background-color: rgb(118, 94, 255);
            border-radius :10px;
            color: honeydew;
            font-size:15px;
        }
        img{
            width:479px;
            height:478px;
        }
    </style>
</head>
<body>
    <div id = "outer">
        <p id = info>共n张图片，这是第m张</p>
        <img id = "img" src = "C:/Users/Dell/Desktop/前    端/resource/xiaotupian (1).jpg" alt = "tupian">
        <button id = "prev"><span id = "asd">上一页</span></button>
        <button id = "next"><span>下一页</span></button>
    </div>

    <script>
        var prev = document.getElementById("prev");
        var next = document.getElementById("next");
        var img = document.getElementById("img");
        var info = document.getElementById("info");
        var index = 0;
        var imgArr = [
            "C:/Users/Dell/Desktop/前端/resource/xiaotupian (1).jpg",
            "C:/Users/Dell/Desktop/前端/resource/xiaotupian (2).jpg",
            "C:/Users/Dell/Desktop/前端/resource/xiaotupian (3).jpg",
        ];
        info.innerHTML = "共有"+imgArr.length+"张图片，这是第"+(index+1)+"张";
        prev.onclick = function(){
            if(index > 0){
                index--;
                img.src = imgArr[index];
                info.innerHTML = "共有"+imgArr.length+"张图片，这是第"+(index+1)+"张";
            }
        }
        next.onclick = function(){
            if(index < imgArr.length-1){
                index++;
                img.src = imgArr[index];
                info.innerHTML = "共有"+imgArr.length+"张图片，这是第"+(index+1)+"张";
            }
            
        }
    </script>
</body>
</html>
-------------本文结束感谢您的阅读-------------