<div class="theme-popover">
<div class="theme-poptit">
<a href="javascript:void(0);" title="关闭" class="close">×</a>
<h3>登录 是一种态度</h3>
</div>
<div class="theme-popbod dform">
<form class="theme-signin" name="loginform" action="" method="post">
<ol>
<li><h4>你必须先登录！</h4></li>
<li><strong>用户名：</strong><input class="ipt" type="text" name="log" value="lanrenzhijia" size="20" /></li>
<li><strong>密码：</strong><input class="ipt" type="password" name="pwd" value="***" size="20" /></li>
<li><input class="btn btn-primary" type="submit" name="submit" value=" 登 录 " /></li>
</ol>
</form>
</div>
</div>
<div class="theme-popover-mask"></div>

//code from http://caibaojian.com/bootstrap-modal.html
.theme-popover-mask {
z-index: 9998;
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:#000;
opacity:0.4;
filter:alpha(opacity=40);
display:none
}
.theme-popover {
z-index:9999;
position:fixed;
top:50%;
left:50%;
width:660px;
height:360px;
margin:-180px 0 0 -330px;
border-radius:5px;
border:solid 2px #666;
background-color:#fff;
display:none;
box-shadow: 0 0 10px #666;
}

jQuery(document).ready(function($) {
$('.theme-login').click(function(){
$('.theme-popover-mask').fadeIn(100);
$('.theme-popover').slideDown(200);
})
$('.theme-poptit .close').click(function(){
$('.theme-popover-mask').fadeOut(100);
$('.theme-popover').slideUp(200);
})
})