本文实例讲述了jQuery实现的登录浮动框效果代码。分享给大家供大家参考。具体如下：
这是一款jQuery登录浮动框代码，点击登录按钮后可看到弹出了一个浮动层，右上角带有关闭按钮，本浮动层不支持拖动，在网上经常会见到的一种浮动层格式。
运行效果截图如下：
在线演示地址如下：
http://demo.phpstudy.net/js/2015/jquery-float-login-dlg-style-demo/
具体代码如下：
<!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=gb2312" />
<title>jQuery登录浮动框代码</title>
<style type="text/css">
body{ margin:0px; padding:0px; background-color:#f0f0f0; font-family:Arial, Helvetica, sans-serif;}
a{ text-decoration:none;}
.top{ width:760px; height:30px; border-bottom:1px solid #dbdbdb; margin:0px auto;}
.logo{ width:300px; height:30px; line-height:30px; float:left; font-size:14px; margin:0px 5px;}
.logo a{ color:#666666;}
.denglu{ height:30px; line-height:30px; float:right; font-size:14px;}
.denglu a{ color:#666666; margin:0px 10px;}
.clear{ display:block; height:0px; line-height:0px; font-size:0px; clear:both;}
.fd{ width:100%; height:auto; position:absolute; top:150px; left:0px; z-index:1; display:none;}
.fd_box{ width:320px; height:auto; margin:0px auto; position:relative; }
.tm_box{ width:300px; height:200px; padding:10px; background-color:#FFFFFF; -webkit-border-radius:5px;-moz-border-radius:5px;border-radius:5px; FILTER: alpha(opacity=50); opacity: 0.5; -moz-opacity: 0.5; position:absolute; top:0px; left:0px; z-index:2;}
.denglu_box{ width:280px; height:180px; padding:10px; background-color:#FFFFFF; -webkit-border-radius:5px;-moz-border-radius:5px;border-radius:5px; position:absolute; top:10px; left:10px; z-index:3; font-family:"宋体";}
.denglu_box h1{ width:270px; height:30px; line-height:30px; font-size:14px; margin:0px; padding:0px 5px; font-weight:100; color:#666666; border-bottom:1px solid #009999;}
.denglu_box span{ color:#666666; display:block; margin:10px 0px; padding:0px 5px;}
.guanbi{ width:14px; height:13px; background-image:url(images/close.gif); background-repeat:no-repeat; position:absolute; top:25px; right:25px; z-index:4; cursor: pointer;}
.box{ width:760px; height:auto; margin:0px auto; border-top:1px solid #f9f9f9;}
.box img{ margin:50px auto; display:block; border:0px;}
</style>
<script type="text/javascript" src="jquery-1.6.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#mj").click( function(){
$(".fd").show();
return false;
});
$(".guanbi").click( function(){
$(".fd").hide();
});
})
</script>
</head>
<body>
<div class="top">
<div class="logo"><a href="#">MJBlog</a></div>
<div class="denglu"><a href="denglu.html" id="mj">登录</a><a href="#">注册</a></div>
<div class="clear"></div>
</div>
<div class="box"><a href="#"><img src="images/wall3.jpg" /></a></div>
<div class="fd">
<div class="fd_box">
<div class="tm_box"></div>
<div class="denglu_box">
<h1>用户登录</h1>
<span>用户名：<input name="" type="text" /></span>
<span>密 码：<input name="" type="text" /></span>
</div>
<div class="guanbi"></div>
</div>
</div>
</body>
</html>
希望本文所述对大家的jQuery程序设计有所帮助。