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js点小图显示大图的切换功能代码

时间：2021-07-01 10:21:17 帮助过：2人阅读

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 
<html> 
    <head> 
        <meta http-equiv="Content-Type" content="text/html; charset=GB2312" /> 
        <title>javascript点小图出大图 练习 by 阿会楠</title> 
        <style type="text/css"> 
        body{ 
            text-align:center; 
            margin:0 auto; 
        } 
        #imgList li img{ 
            width:80px; 
            height:80px; 
            border:1px solid #cccccc; 
        } 
        ul li{ 
            list-style:none; 
            float:left; 
            margin-left:20px; 
            cursor:pointer; 
        } 
        .rborder{ 
            border:1px solid yellow; 
        } 
        </style> 
        <script language="JavaScript" type="text/javascript"> 
            var img = new Array(); 
            img[0] = "/upload/20080918164412320.jpg"; 
            img[1] = "/upload/20080918164413758.jpg"; 
            img[2] = "/upload/20080918164414965.jpg"; 
            function $(obj){ 
                return document.getElementById(obj); 
            } 
            function $img(url){ 
                return "<img src='" + url + "' onclick='changeborder(this)' />"; 
            } 
            function changeborder(obj){ 
                    for(var j = 0;j < img.length;j++){ 
                    $("imgList").getElementsByTagName("li")[j].getElementsByTagName("img")[0].style.borderColor = "#cccccc"; 
                } 
                obj.style.borderColor= "red"; 
                $("bImg").innerHTML = $img(obj.src); 
            } 
            window.onload = function(){ 
                for(var i = 0;i < img.length;i++){ 
                    $("imgList").innerHTML += "<li>" + $img(img[i]) + "</li>"; 
                } 
                if($("bImg").innerHTML == ""){ 
                    $("bImg").innerHTML = $img(img[0]); 
                    $("imgList").getElementsByTagName("li")[0].getElementsByTagName("img")[0].style.borderColor = "red"; 
                } 
                 
            } 
             
        </script> 
    </head> 
    <body> 
         
        <ul id="imgList"></ul> 
    </body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

js点小图显示大图的切换功能代码

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