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  • Overlay 遮罩层

    <!DOCTYPE HTML>
    <html lang="zh-CN">
    <head>
        <meta charset="utf-8">
        <title></title>
        <style type="text/css">
            img{padding: 5px;}
            #outer{width: 100%;height: 100%;}
            .overlay{background-color: #000;opacity: .7;filter:alpha(opacity=70);position: fixed;top:0;left: 0;width: 100%;height: 100%;z-index: 10;}
            .overlayimg{position: absolute;z-index: 11;left: 50px;top: 50px;}
        </style>
    
        <script type="text/javascript">
            function expandPhoto(){
    
                var overlay=document.createElement("div");
                overlay.setAttribute("id","overlay");
                overlay.setAttribute("class","overlay");
                document.body.appendChild(overlay);
    
                var img=document.createElement("img");
                img.setAttribute("id","img");
                img.src=this.getAttribute("data-larger");
                img.setAttribute("class","overlayimg");
    
                img.onclick=restore;
    
                document.body.appendChild(img);
            }
    
    
            function restore(){
                document.body.removeChild(document.getElementById("overlay"));
                document.body.removeChild(document.getElementById("img"));
            }
    
            window.onload=function(){
                var imgs=document.getElementsByTagName("img");
                console.log(imgs)
                imgs[0].focus();
                for(var i=0;i<imgs.length;i++){
                    imgs[i].onclick=expandPhoto;
                    imgs[i].onkeydown=expandPhoto;
                }
            }
        </script>
    </head>
    <body>
        <div id="outer">
            <img src="juhua.jpg" alt="" data-larger="juhua.jpg">
            <img src="kaola.jpg" alt="" data-larger="kaola.jpg">
        </div>
    
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/wangwenfei/p/overlay.html
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