9.29特效 弹出层~
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<title></title>
<style>
* {
margin: 0px;
padding: 0px;
}
.mask {
width: 100%;
height: 500px;
background-color: black;
opacity: 0.5;
position: fixed;
top: 0px;
left: 0px;
z-index: 400;
}
.out {
width: 300px;
height: 200px;
background-color: green;
position: fixed;
/*top: 100px;
left: 100px;*/
z-index: 998;
}
</style>
</head>
<body>
<input type="button" value="弹出" id="btn1" />
<div class="mask" hidden="hidden"></div>
<div class="out" hidden="hidden"></div>
<p>123</p>
<p>123</p>
<p>123</p>
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<p>123</p>
<p>123</p>
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<p>123</p>
<p>123</p>
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<p>123</p>
<p>123</p>
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<p>123</p>
<p>123</p>
<p>123</p>
<p>123</p>
<p>123</p>
</body>
</html>
<script>
var mask = document.getElementsByClassName("mask")[0];
var out = document.getElementsByClassName("out")[0];
var btn1 = document.getElementById("btn1");
var c_height = document.documentElement.clientHeight;
var c_width = document.documentElement.clientWidth;
var top_ = c_height / 2 - 100;
var left = c_width / 2 - 150;
mask.style.height = c_height + "px";
out.style.top = top_ + "px";
out.style.left = left + "px";
btn1.onclick = function() {
mask.removeAttribute("hidden");
out.removeAttribute("hidden");
}
mask.onclick = function() {
mask.setAttribute("hidden", "hidden");
out.setAttribute("hidden", "hidden");
}
window.onresize = function() {
var c_height = document.documentElement.clientHeight;
var c_width = document.documentElement.clientWidth;
var top_ = c_height / 2 - 100;
var left = c_width / 2 - 150;
mask.style.height = c_height + "px";
out.style.top = top_ + "px";
out.style.left = left + "px";
}
</script>
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