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js带有遮罩的弹窗

2024-10-19 07:59:02   209人阅读

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js制作带有遮罩弹出层实现登录小窗口</title>
    <link type="text/css" rel="stylesheet" href="http://www.mamicode.com/css/reset.css" />
    <script>
        window.onload = function(){
            document.getElementById("btn_showlogin").onclick = shogMinLogin;
            document.getElementById("close_minilogin").onclick = closeLogin;
            document.getElementById("firstLine").onmousedown = moveLogin;
            /* 显示登录窗口 */
            function shogMinLogin(){
                var mini_login = document.getElementsByClassName("mini_login")[0];
                var cover = document.getElementsByClassName("cover")[0];
                mini_login.style.display = "block";
                cover.style.display = "block";

                mini_login.style.left = (document.body.scrollWidth - mini_login.scrollWidth) / 2 + "px";
                mini_login.style.top = (document.body.scrollHeight - mini_login.scrollHeight) / 2 + "px";
            }

            /* 关闭登录窗口 */
            function closeLogin(){
                var mini_login = document.getElementsByClassName("mini_login")[0];
                var cover = document.getElementsByClassName("cover")[0];
                mini_login.style.display = "none";
                cover.style.display = "none";
            }

            /* 移动登录窗口 */
            function moveLogin(event){
                var moveable = true;

                //获取事件源
                event = event ? event : window.event;
                var clientX = event.clientX;
                var clientY = event.clientY;

                var mini_login = document.getElementById("mini_login");
                console.log(mini_login);
                var top = parseInt(mini_login.style.top);
                var left = parseInt(mini_login.style.left);//鼠标拖动
                document.onmousemove = function(event){
                    if(moveable){
                        event = event ? event : window.event;
                        var y = top + event.clientY - clientY;
                        var x = left + event.clientX - clientX;
                        if(x>0 && y>0){
                            mini_login.style.top = y + "px";
                            mini_login.style.left = x + "px";
                        }
                    }
                }
                //鼠标弹起
                document.onmouseup = function(){
                    moveable = false;
                }
            }
        };
    </script>

    <style>
        /* 弹出 样式 */
        .mini_login{
            display:none;
            position:absolute;
            z-index:2;
            background:white;
        }
        .mini_login .item{
            width:320px;
            margin:0 auto;
            height:48px;
            line-height:48px;
            padding:0 20px;
        }
        /* 登录窗第一行*/
        .mini_login .firstLine{
            color:#666;
            background:#f7f7f7;
            font-size:18px;
            font-weight:bold;
            cursor:move;
        }
        .mini_login .item .login_close{
            display:inline-block;
            float:right;
            cursor:pointer;
        }

        .mini_login .item label{
            font-size:14px;
            margin-right:15px;
        }
        .mini_login .item input{
            display:inline-block;
            height:60%;
            width:70%;
        }
        /* 登录按钮 */
        .mini_login .item a.btn_login{
            display:block;
            margin:10px 10% 0;
            height:30px;
            line-height:30px;
            width:80%;
            background:#4490F7;
            color:white;
            font-size:16px;
            font-weight:bold;
            text-align:center;
        }
        /* 遮罩层样式 */
        .cover{
            display:none;
            width:100%;
            height:100%;
            position:absolute;
            top:0;
            left:0;
            z-index:1;
            background-color:#000;
            opacity:0.3;
        }
    </style>
</head>
<body>

<!-- 主体 -->
<div class="main">
    <a href="javascript:void(0)" class="btn_login" id="btn_showlogin">登录框</a>
</div>

<!-- 弹出登录小窗口 -->
<div class="mini_login" id="mini_login">
    <!-- 表单 -->
    <form action="" method="post">
        <div class="item firstLine" id="firstLine">
            <span class="login_title">我要登录</span>
            <span class="login_close" id="close_minilogin">X</span>
        </div>
        <div class="item">
            <label>用户</label>
            <input type="text" name="uname" />
        </div>
        <div class="item">
            <label>密码</label>
            <input type="password" name="upwd" />
        </div>
        <div class="item">
            <a href="javascript:void(0)" class="btn_login" onclick="">登录</a>
        </div>
    </form>
</div>
<!-- 遮罩层 -->
<div class="cover"></div>

</body>
</html>

js带有遮罩的弹窗


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