Pop Up Me gusta de Facebook para Blogger

Un usuario anonimo me pidio un truco tipo PopUp en el se mostrase el boton Me Gusta de Facebook,y buscando un poco he encontrado el tutorial.

La vista previa del truco es la siguiente:

La ventana se vera la primera vez que el lector entre a tu pagina con el fin de evitar molestias a los usuarios.

Para añadir este truco añade en un elemento HTML/Javascript lo siguiente:

<style>

/*
ColorBox Core Style:
The following CSS is consistent between example themes and should not be altered.
*/
#colorbox, #cboxOverlay, #cboxWrapper{position:absolute; top:0; left:0; z-index:9999; overflow:hidden;}
#cboxOverlay{position:fixed; width:100%; height:100%;}
#cboxMiddleLeft, #cboxBottomLeft{clear:left;}
#cboxContent{position:relative;}
#cboxLoadedContent{overflow:auto;}
#cboxTitle{margin:0;}
#cboxLoadingOverlay, #cboxLoadingGraphic{position:absolute; top:0; left:0; width:100%;}
#cboxPrevious, #cboxNext, #cboxClose, #cboxSlideshow{cursor:pointer;}
.cboxPhoto{float:left; margin:auto; border:0; display:block;}
.cboxIframe{width:100%; height:100%; display:block; border:0;}
/*

User Style:
Change the following styles to modify the appearance of ColorBox. They are
ordered & tabbed in a way that represents the nesting of the generated HTML.
*/
#cboxOverlay{background:#000;opacity:0.5 !important;}
#colorbox{
box-shadow:0 0 15px rgba(0,0,0,0.4);
-moz-box-shadow:0 0 15px rgba(0,0,0,0.4);
-webkit-box-shadow:0 0 15px rgba(0,0,0,0.4);
}
#cboxTopLeft{width:14px; height:14px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) no-repeat 0 0;}
#cboxTopCenter{height:14px; background:url(http://1.bp.blogspot.com/-TcJGMnSfOC...600/border.png) repeat-x top left;}
#cboxTopRight{width:14px; height:14px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) no-repeat -36px 0;}
#cboxBottomLeft{width:14px; height:43px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) no-repeat 0 -32px;}
#cboxBottomCenter{height:43px; background:url(http://1.bp.blogspot.com/-TcJGMnSfOC...600/border.png) repeat-x bottom left;}
#cboxBottomRight{width:14px; height:43px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) no-repeat -36px -32px;}
#cboxMiddleLeft{width:14px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) repeat-y -175px 0;}
#cboxMiddleRight{width:14px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) repeat-y -211px 0;}
#cboxContent{background:#fff; overflow:visible;}
#cboxLoadedContent{margin-bottom:5px;}
#cboxLoadingOverlay{background:url(http://1.bp.blogspot.com/-PPvu-446sn...background.png) no-repeat center center;}
#cboxLoadingGraphic{background:url(http://1.bp.blogspot.com/-31strss_1-...00/loading.gif) no-repeat center center;}
#cboxTitle{position:absolute; bottom:-25px; left:0; text-align:center; width:100%; font-weight:bold; color:#7C7C7C;}
#cboxCurrent{position:absolute; bottom:-25px; left:58px; font-weight:bold; color:#7C7C7C;}
#cboxPrevious, #cboxNext, #cboxClose, #cboxSlideshow{position:absolute; bottom:-29px; background:url(http://1.bp.blogspot.com/-FiJ_Xz7txE...0/controls.png) no-repeat 0px 0px; width:23px; height:23px; text-indent:-9999px;}
#cboxPrevious{left:0px; background-position: -51px -25px;}
#cboxPrevious.hover{background-position:-51px 0px;}
#cboxNext{left:27px; background-position:-75px -25px;}
#cboxNext.hover{background-position:-75px 0px;}
#cboxClose{right:0; background-position:-100px -25px;}
#cboxClose.hover{background-position:-100px 0px;}
.cboxSlideshow_on #cboxSlideshow{background-position:-125px 0px; right:27px;}
.cboxSlideshow_on #cboxSlideshow.hover{background-position:-150px 0px;}
.cboxSlideshow_off #cboxSlideshow{background-position:-150px -25px; right:27px;}
.cboxSlideshow_off #cboxSlideshow.hover{background-position:-125px 0px;}
/*-----------------------------------------------------------------------------------*/
/* Facebook Likebox popup For Blogger
/*-----------------------------------------------------------------------------------*/
#subscribe {
font: 12px/1.2 Arial,Helvetica,san-serif; color:#666;
}
#subscribe a,
#subscribe a:hover,
#subscribe a:visited {
text-decoration:none;
}
.box-title {
color: #3B5998;
font-size: 20px !important;
font-weight: bold;
margin: 10px 0;
border:1px solid #ddd;
-moz-border-radius:6px;
-webkit-border-radius:6px;
border-radius:6px;
box-shadow: 5px 5px 5px #CCCCCC;
padding:10px;
line-height:25px; font-family:arial !important;
}
.box-tagline {
color: #999;
margin: 0;
text-align: center;
}
#subs-container {
padding: 35px 0 30px 0;
position: relative;
}
a:link, a:visited {
border:none;
}
.demo {
display:none;
}
</style>

<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js'></script>
<script src="http://yourjavascript.com/11215013191/jquery.colorbox-min.js"></script>
<script type="text/javascript">
jQuery(document).ready(function(){
if (document.cookie.indexOf('visited=true') == -1) {
var fifteenDays = 1000*60*60*24*30;
var expires = new Date((new Date()).valueOf() + fifteenDays);
document.cookie = "visited=true;expires=" + expires.toUTCString();
$.colorbox({width:"400px", inline:true, href:"#subscribe"});
}
});
</script>


<div style='display:none'>
<div id='subscribe' style='padding:10px; background:#fff;'>
<h3 class="box-title">Mantente en contacto con nosotros a través de Facebook. Sólo presiona el botón Me gusta <center><p style="line-height:3px;" >▼</p></center></h3>
<center>

<iframe src="//www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2Fpages%2FXanacom%2F 160821757320162&width=300&colorscheme=light&show_face s=true&border_color=%23ffffff&stream=false &header=false&height=258" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:300px; height:258px;" allowtransparency="true"></iframe>

</center>
</div>
</div>