If you want to amaze your visitors by showing their own details on your website/blog, like IP address, ISP name, Country, region and time zone, then here is some block of code that you have to add to your blog.
The two images in blue displayed below, presently would be showing your details, similarly it would show the details of anyone reading your blog/web site if you place these on your blog.

Code to be added:

<img border="0" src="http://www.ip2location.com/images/ip2location.png"/>
Widget by <a href="http://netpassion4u.blogspot.com"/>BTAT</a>

OR you may add this image:


Code to be added:

<img border="0" src="http://www.ip2location.com/images/ip2locationbig.png"/>
Widget by <a href="http://netpassion4u.blogspot.com"/>BTAT</a>

Simply add a HTML/JavaScript widget in your blog, and add any of the two codes shown above. That's it....no javascripting or any other complex coding required for this hack.