Using a combination of SSI and JavaScript, this script displays the visitor's IP address.
Developer: javascriptkit.com Platform: Date upd:2003-04-29 Hits12138 [Visit]

You can have a look on small example of JavaScript code which can be used for Browser Check and retreiving major and minor browser version in "major.minor" format.
Developer: arachnoware.com Platform: Any plain HTML with JScript enabled Date upd:2003-06-18 Hits4607 [Download] [Visit]

This script will allow you to 'grab' the user's IP address. It only works with Java-enabled Netscape browsers.
Developer: javascript.internet.com Platform: Independent Date upd:1999-08-23 Hits11833 [Visit]

This JavaScript simply identifies and writes the visitor's browser and operating system in a little box to the screen.
Developer: javascript.internet.com Platform: Independent Date upd:1999-08-23 Hits5120 [Visit]

This script records the date plus time of your visitor's last visit and displays it upon their return. If this is their first visit to your site, a greeting message is shown instead.
Developer: JavaScript Kit Platform: linux, windows Date upd:2006-09-06 Hits725 [Visit]