Steps
1. Login to your Blogger account.
2. Go to TEMPLATE -> EDIT HTML
3. Tick expand widget templates
4. Find <body> or <head>
5. Paste below code just below the <body> or <head>
<!--FB Content Lock Code Starts-->
<link href='https://sites.google.com/site/r4vemaster/my-file/fb-like-pop.css' rel='stylesheet' type='text/css'/>
<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js'/>
<script src='http://connect.facebook.net/en_US/all.js#xfbml=1' type='text/javascript'/>
<script src='https://sites.google.com/site/r4vemaster/my-file/fb-like-pop.js' type='text/javascript'/>
<!--FB Content Lock Code Ends-->
6. After that, go to LAYOUT -> ADD HTML/JAVASCRIPT , and paste code below anywhere.
//<![CDATA[
$(document).ready(function() {
$('body').facebookTrafficPop( {
timeout: 60,
title: "Like My Facebook Page",
message: 'YOUR MESSAGE FOR VISITOR',
url: "URL TO BE LIKED",
'opacity': 0.3,
'advancedClose':false,
closeable: false
} );
});
//]]>
</script>