Would be not wrong if I say you already use facebook like box for your facebook page at your website/blog. But they don’t have any kind of effect they just live at your website/blog like a simple widget.
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Login to your WordPress Dashboard.
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Navigate to Appearance > Widgets
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Drag and drop a Text (Arbitrary text or HTML ) widget to the sidebar
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Paste the following code inside it, if your facebook page URL is look like “https://www.facebook.com/NAME” then use this code
<script type=”text/javascript”>
//<!–
$(document).ready(function() {$(“.w2bslikebox”).hover(function() {$(this).stop().animate({right: “0″}, “medium”);}, function() {$(this).stop().animate({right: “-250″}, “medium”);}, 500);});
//–>
</script>
<style type=”text/css”>
.w2bslikebox{background: url(“http://1.bp.blogspot.com/–tscpVzcBjo/TdUarKtcAlI/AAAAAAAAA3I/qVkypiYO9rc/s150/w2b_facebookbadge.pn”) no-repeat scroll left center transparent !important;display: block;float: right;height: 270px;padding: 0 5px 0 46px;width: 245px;z-index: 99999;position:fixed;right:-250px;top:20%;}
.w2bslikebox div{border:none;position:relative;display:block;}
.w2bslikebox span{bottom: 12px;font: 8px “lucida grande”,tahoma,verdana,arial,sans-serif;position: absolute;right: 6px;text-align: right;z-index: 99999;}
.w2bslikebox span a{color: #808080;text-decoration:none;}
.w2bslikebox span a:hover{text-decoration:underline;}
</style><div style=”"><div><iframe src=”http://www.facebook.com/plugins/likebox.php?href=xxxxxxxxxxxxxxxxxxxxxxxxxx&width=245&colorscheme=light&show_faces=true& connections=9&stream=false&header=false&height=270″ scrolling=”no” frameborder=”0″ scrolling=”no” style=”border: medium none; overflow: hidden; height: 270px; width: 245px;background:#fff;”></iframe><span>Widget by:<a href=”http://thingsnews.com/sliding-facebook-likebox-to-wordpress/”>Things Widget</a></span></div></div>
Replace “xxxxxxxxxxxxxxxxxxxxxxxxxx” with you page username. In case your facebook Page URL looks like: https://www.facebook.com/NAME
Then better create a Facebook Username in 5 seconds by visiting this Link
5. Save your widget.
6. Next In your theme options > Go to Head Code.
7. Paste the code below in the head code box.
<script type=”text/javascript” src=”https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js”></script>
8. Click Save.
Visit your blog to see it working, Hope you enjoy the post.

i m not being to find were it option “Head Code” please help me giving a direct link to Head Code.