Live Demo

Để thực hiện thủ thuật này rất đơn giản, chỉ cần chèn đoạn mã code sau vào một Widget HTML/Javascript và Lưu lại.

<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js' type='text/javascript'></script>
<style>
#fanback {
display:none;
background:rgba(0,0,0,0.8);
width:100%;
height:100%;
position:fixed;
top:0;
left:0;
z-index:99999;
}
#fan-exit {
width:100%;
height:100%;
}
#fanbox {
background:white;
width:420px;
height:270px;
position:absolute;
top:58%;
left:63%;
margin:-220px 0 0 -375px;
-webkit-box-shadow: inset 0 0 50px 0 #939393;
-moz-box-shadow: inset 0 0 50px 0 #939393;
box-shadow: inset 0 0 50px 0 #939393;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
margin: -220px 0 0 -375px;
}
#fanclose {
float:right;
cursor:pointer;
background:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6FsSfnPNMmGbqn66PcblMOGU7Y5uf5492ytqW4yuQhfp5zE37LJHYSKaELvrJslHeCwL4u7z0SxBf2xpCVeIHJryGYcnzkHdipjf6xMV3xNFseuLQP7LZeEIvNeRhvW6lSmCZxBmXdVou/s1600/fanclose.png) repeat;
height:15px;
padding:20px;
position:relative;
padding-right:40px;
margin-top:-20px;
margin-right:-22px;
}
.remove-borda {
height:1px;
width:366px;
margin:0 auto;
background:#F3F3F3;
margin-top:16px;
position:relative;
margin-left:20px;
}
</style>
<script type='text/javascript'>
//<![CDATA[
jQuery.cookie = function (key, value, options) {
// key and at least value given, set cookie...
if (arguments.length > 1 && String(value) !== "[object Object]") {
options = jQuery.extend({}, options);
if (value === null || value === undefined) {
options.expires = -1;
}
if (typeof options.expires === 'number') {
var days = options.expires, t = options.expires = new Date();
t.setDate(t.getDate() + days);
}
value = String(value);
return (document.cookie = [
encodeURIComponent(key), '=',
options.raw ? value : encodeURIComponent(value),
options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
options.path ? '; path=' + options.path : '',
options.domain ? '; domain=' + options.domain : '',
options.secure ? '; secure' : ''
].join(''));
}
// key and possibly options given, get cookie...
options = value || {};
var result, decode = options.raw ? function (s) { return s; } : decodeURIComponent;
return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
};
//]]>
</script>
<script type='text/javascript'>
jQuery(document).ready(function($){
if($.cookie('popup_user_login') != 'yes'){
$('#fanback').delay(100).fadeIn('medium');
$('#fanclose, #fan-exit').click(function(){
$('#fanback').stop().fadeOut('medium');
});
}
$.cookie('popup_user_login', 'yes', { path: '/', expires: 7 });
});
</script>
<div id='fanback'><div id='fan-exit'></div><div id='fanbox'><div id='fanclose'></div><div class='remove-borda'></div>
<iframe allowtransparency='true' frameborder='0' scrolling='no' src='//www.facebook.com/plugins/likebox.php?
href=http://www.facebook.com/Terocket&width=402&height=255&colorscheme=light&show_faces=true&border_color=%23E2E2E2&stream=false&header=false' style='border: none; overflow: hidden; margin-top: -19px; width: 402px; height: 230px;'></iframe>
</div></div>

<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js' type='text/javascript'></script>