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js弹出层的写法实例

2018-06-24 01:50:08来源：未知阅读 ()

点击后弹出界面，通过判断浏览器长宽自动设定页面宽度和登陆页面位置。

<style>

/*遮罩层弹出层*/

.mask {
width: 100%;
background-color: rgba(0, 0, 0, 0.8);
position: fixed;
top: 0px;
left: 0px;
z-index: 200;
}

.show_d {
width: 300px;
height: 300px;
background-color: gainsboro;
position: fixed;
z-index: 300;
}

</style>

<body>

<div class="mask" hidden="hidden"></div>


<div class="show_d" hidden="hidden">

</div>

</body>

</html>
<script>
//弹出层大小设定
var mask = document.getElementsByClassName("mask")[0];
var show_d = document.getElementsByClassName("show_d")[0];
var top_d = document.getElementsByClassName("top_d")[0];
var show_d_r = document.getElementsByClassName("show_d_r")[0];

var c_height = document.documentElement.clientHeight;
var c_width = document.documentElement.clientWidth;

mask.style.height = c_height + "px";
show_d.style.top = c_height / 2 - 150 + "px";
show_d.style.left = c_width / 2 - 150 + "px";

//登陆弹出设定
top_d.onclick = function() {
mask.removeAttribute("hidden");
show_d.removeAttribute("hidden");
}
mask.onclick = function() {
mask.setAttribute("hidden", "hidden");
show_d.setAttribute("hidden", "hidden");
}
show_d_r.onclick = function() {
mask.setAttribute("hidden", "hidden");
show_d.setAttribute("hidden", "hidden");
}