_b.blogID is a string that contains the blog's ID. This string is also used as a default for other _b methods. The value of _b.blogID can also be changed with the _b.defaults() method which will not only improve performance but will also provide a more secure blog ID to be used as a default in other _b methods. In the example below when alertID() is called there will be an alert of the blog ID string <script type='text/javascript'> function alertID(){ alert(_b.blogID); } </script> In the code below the blog ID is predefined so will be used as a default in all _b methods. <script type='text/javascript'> window.onload=function(){ _b.defaults({ blogID:"8369227433074681144" }); } </script>