点击登录会出现弹出框,有点错误.没搞明白, 为什么会不居中
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
* {
margin: 0px;
padding: 0px;
}
.div1 {
100%;
height: 500px;
background-color: black;
opacity: 0.5;
position: fixed;
top: 0px;
left: 0px;
z-index: 40;
}
.div {
300px;
height: 200px;
background-color: red;
position: fixed;
top: 100px;
left: 100px;
z-index: 80;
}
</style>
</head>
<body>
<input type="button" value="登陆" id="b1" />
<div class="div1" hidden="hidden"></div>
<div class="div" hidden="hidden"></div>
</body>
</html>
<script>
var div1 = document.getElementsByClassName("div1")[0];
var div = document.getElementsByClassName("div")[0];
var b1 = document.getElementById("b1");
var c1 = document.documentElement.clientHeight;
var c2 = document.documentElement.clientWidth;
var a1 = c1 / 2 - 100;
var a2 = c2 / 2 - 150;
div1.style.height = c1 + "px";
div.style.top = a1 + "px";
div.style.a2 = a2 + "px";
b1.onclick = function() {
div1.removeAttribute("hidden");
div.removeAttribute("hidden");
}
div1.onclick = function() {
div1.setAttribute("hidden", "hidden");
div.setAttribute("hidden", "hidden");
}
window.onresize = function() {
var c1 = document.documentElement.clientHeight;
var c2 = document.documentElement.clientWidth;
var a1 = c1 / 2 - 100;
var a2 = c2 / 2 - 150;
div1.style.height = c1 + "px";
div.style.top = a1 + "px";
div.style.a2 = a2 + "px";
}
</script>