这是代码，谁能帮我解决这个问题，我想让它保持居中，它会相对扩大蒙版，即使你放大你的浏览器，给它一个尝试，所以你会知道我在说什么，我不是专家，我还在学习
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Simple JQuery Modal Window from Queness</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var id = '#dialog';
//Get the screen height and width
var maskHeight = $(document).height();
var maskWidth = $(window).width();
//Set heigth and width to mask to fill up the whole screen
$('#mask').css({'width':maskWidth,'height':maskHeight});
//transition effect
$('#mask').fadeIn(1000);
$('#mask').fadeTo("slow",0.8);
//Get the window height and width
var winH = $(window).height();
var winW = $(window).width();
//Set the popup window to center
$(id).css('top', winH/2-$(id).height()/2);
$(id).css('left', winW/2-$(id).width()/2);
//transition effect
$(id).fadeIn(2000);
//if close button is clicked
$('.window .close').click(function (e) {
//Cancel the link behavior
e.preventDefault();
$('#mask').hide();
$('.window').hide();
});
});
</script>
<style type="text/css">
}
a {color:#333; text-decoration:none}
a:hover {color:#ccc; text-decoration:none}
.close {
-moz-box-shadow:inset 0px 1px 0px 0px #ffffff;
-webkit-box-shadow:inset 0px 1px 0px 0px #ffffff;
box-shadow:inset 0px 1px 0px 0px #ffffff;
background:-webkit-gradient( linear, left top, left bottom, color-stop(0.05, #f9f9f9), color-stop(1, #e9e9e9) );
background:-moz-linear-gradient( center top, #f9f9f9 5%, #e9e9e9 100% );
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#f9f9f9', endColorstr='#e9e9e9');
background-color:#f9f9f9;
-webkit-border-top-left-radius:20px;
-moz-border-radius-topleft:20px;
border-top-left-radius:20px;
-webkit-border-top-right-radius:20px;
-moz-border-radius-topright:20px;
border-top-right-radius:20px;
-webkit-border-bottom-right-radius:20px;
-moz-border-radius-bottomright:20px;
border-bottom-right-radius:20px;
-webkit-border-bottom-left-radius:20px;
-moz-border-radius-bottomleft:20px;
border-bottom-left-radius:20px;
text-indent:-0.48px;
border:1px solid #dcdcdc;
display:inline-block;
color:#666666;
font-family:Verdana;
font-size:11px;
font-weight:bold;
font-style:normal;
height:18px;
line-height:18px;
width:18px;
text-decoration:none;
text-align:center;
text-shadow:1px 1px 0px #ffffff;
display:inline;
z-index:3200; position:absolute; top: -10px; right:-10px; cursor:pointer;}
}
.close:hover {
background:-webkit-gradient( linear, left top, left bottom, color-stop(0.05, #e9e9e9), color-stop(1, #f9f9f9) );
background:-moz-linear-gradient( center top, #e9e9e9 5%, #f9f9f9 100% );
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#e9e9e9', endColorstr='#f9f9f9');
background-color:#e9e9e9;
}
#mask {
position:absolute;
left:0;
top:0;
z-index:9000;
background-color:#000;
display:none;
}
#boxes .window {
position:absolute;
left:0;
top:0;
width:440px;
height:200px;
display:none;
z-index:9999;
padding:20px;
}
#boxes #dialog {
width:728px;
height:90px;
padding:10px;
background-color:#ffffff;
}
</style>
</head>
<body>
<div id="boxes">
<div id="dialog" class="window">
<a href="#" class="close">X</a>
</div>
<div style="width: 1478px; height: 602px; display: none; opacity: 0.8;" id="mask"></div>
</div>
</body>
</html>
尝试插入<body align="center">或将整个身体包裹在<div id="something">中并给予#something {
text-align:center;
}
中的CSS在您的代码的<head></head>。