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簡單js遮罩效果,彈出註冊介面

<head>
    <meta charset="UTF-8">
    <title>遮罩</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        #shade{
            position: fixed;
            width: 100%;
            height: 100%;
            display: none;
        }
        .shade-background
{ width: 100%; height: 100%; background-color: #CCCCCC; opacity: 0.5; } #register{ position: relative; background-color: #fff; width: 500px; height: 300px; top: -70%; margin: 0
auto
; }
</style> </head> <body> <div id="shade"> <div class="shade-background"></div> <div id="register"> 使用者名稱<input type="" name="" id="" value="" /><br /> 密&nbsp;碼<input type="" name="" id="" value="" />
<br /> <input type="submit" name="" id="reg" value="註冊" /> </div> </div> <div> <input type="button" name="" id="btn" value="彈出遮罩" /> </div> </body> <script> var shade = document.getElementById("shade"); var btn = document.getElementById("btn"); var reg = document.getElementById("reg"); btn.onclick = function(){ shade.style.display = "block" } reg.onclick = function(){ shade.style.display = "none" } </script>

這裡寫圖片描述