<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>div对话框</title>
<style type="text/css">
#dialog
{
display:none;
border:1px solid #ddd;
height:600px;
900px;
position:fixed;
top:50%;
left:50%;
margin-top: -300px;
margin-left: -450px;
z-index:2;
background: #f8f8f8;
}
</style>
</head>
<body style="height: 1500px;">
<button id="open">弹出</button>
<div id="dialog">
<button id="close" style="float: right;">X</button>
<div></div>
</div>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
<script type="text/javascript">
$(function () {
$('#open').click(function () {
show();
});
$('#close').click(function() {
hide();
})
var dialog = $('#dialog');
function show()
{
dialog.css({'display': 'block'});
}
function hide()
{
dialog.css({'display': 'none'});
}
});
</script>
</body>
</html>