Best books about Javasript

• JavaScript: The Definitive Guide
• JavaScript & DHTML Cookbook
• JavaScript Bible, Fifth Edition
• Beginning javascript

Click on the following button to check your internal IP address. If you are using LAN, it will show your internal IP address..

Click the button get your IP address

How to do it? Put the following script anywhere in your web page. It first will detect if your browser is JAVA enabled (if (navigator.javaEnabled())), otherwise it won't show anything. It uses "java.net.InetAddress.getLocalHost()" to get your internal IP address.

             function checkip() { <!-- if (navigator.javaEnabled()) { document.getElementById('ipaddress').childNodes[0].nodeValue=(java.net.InetAddress.getLocalHost()); return true; //--> } }

Then add the following code to your pages.

<input type="button" name="Button" onclick="checkip()" value="Check my internal IP address">
<p id="ipaddress" >Click the button get your IP address</p>

It will replace "Click the button get your IP address" with your internal IP address(e.g, your IP address in LAN).