<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
body{
margin:0px;
}
#wrap{
background:black;
opacity:0.3;
filter:alpha(apacity=30);
position:absolute;
left:0px;
top:0px;
display:none;
}
#box{
width:300px;
height:200px;
padding:10px;
background:white;
border:5px solid #333;
position:absolute;
display:none;
}
#close{
position:absolute;
right: 5px;
top: 5px;
text-decoration: none;
color: black;
}
#close:hover {
background: #333;
color: white;
}
</style>
<script type="text/javascript">
window.onload = function ()
{
var obtn = document.getElementsByTagName(‘input‘)[0];
var owrap = document.getElementById(‘wrap‘);
var obox = document.getElementById(‘box‘);
var oa = document.getElementById(‘close‘);
oa.onclick = function ()
{
owrap.style.display = ‘none‘;
obox.style.display = ‘none‘;
}
obtn.onclick = function ()
{
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
owrap.style.display = ‘block‘;
owrap.style.width = Math.max(document.documentElement.clientWidth,document.body.offsetWidth) + ‘px‘;
owrap.style.height = Math.max(document.documentElement.clientHeight,document.body.offsetHeight) + ‘px‘;
obox.style.display = ‘block‘;
obox.style.left = (document.documentElement.clientWidth - obox.offsetWidth )/2 + scrollLeft + ‘px‘;
obox.style.top = (document.documentElement.clientHeight - obox.offsetHeight )/2 + scrollTop + ‘px‘;
};
window.onscroll = function ()
{
if(obox.style.display == ‘none‘) return;
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
obox.style.left = (document.documentElement.clientWidth - obox.offsetWidth )/2 + scrollLeft + ‘px‘;
obox.style.top = (document.documentElement.clientHeight - obox.offsetHeight )/2 + scrollTop + ‘px‘;
};
window.onresize = function ()
{
if(obox.style.display == ‘none‘) return;
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
owrap.style.width = Math.max(document.documentElement.clientWidth,document.body.offsetWidth) + ‘px‘;
owrap.style.height = Math.max(document.documentElement.clientHeight,document.body.offsetHeight) + ‘px‘;
obox.style.left = (document.documentElement.clientWidth - obox.offsetWidth )/2 + scrollLeft + ‘px‘;
obox.style.top = (document.documentElement.clientHeight - obox.offsetHeight )/2 + scrollTop + ‘px‘;
};
}
</script>
</head>
<body style="height:2000px;">
<input type="button" value="登陆">
<div id="wrap"></div>
<div id="box">
<a href="javascript:;" id="close">x</a>
这里是登陆的表单等内容
</div>
<div>
</body>
</html>
时间： 2024-07-29 05:37:00