js_补--模拟对话框 

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta charset="UTF-8">
<!--&lt;!&ndash;    <script src="js_file01.js"></script>&ndash;&gt;                               尽量放后body前边-->

    <style>

        *{
            margin: 0;
        }

        #div1{

            position: fixed;
            z-index: 1000;
            top: 0;
            left: 0;
            width: 100%;
            height: 800px;
            background-color: #959da5;
        }

        #div2{
            position: fixed;
            z-index: 1001;
            width: 100%;
            /*height: 300px;*/
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: chartreuse;
            opacity: 0.3;
        }

         #div3{
            width: 300px;
            height: 300px;
            position: absolute;
            z-index: 1002;
            top: 50%;
            left: 50%;
            margin-top: -150px;
            margin-left: -150px;
            background-color: red;
        }
                                                                       /*隐藏*/
        .hide{
            display: none;
        }

    </style>

</head>
<body>

<div id="div1">
    <input type="button" value="click" onclick="show()">
</div>

<div id="div2" class="div hide"></div>

<div id="div3" class="div hide">
    <input type="button" value="cancel" onclick="cancel()">
</div>

<script>

    function show() {
        var el=document.getElementsByClassName("div");
        for (var i=0;i<el.length;i++){
            el[i].classList.remove("hide");
        }
    }

    function cancel() {
        var el=document.getElementsByClassName("div");
        for (var i=0;i<el.length;i++){
            el[i].classList.add("hide");
        }
    }

</script>

</body>
</html>
posted @ 2020-08-18 22:25  zxy_ang  阅读(140)  评论(0)    收藏  举报