Learn Json

http://it.toolbox.com/blogs/enterprise-web-solutions/json-basics-in-javascript-32660

http://en.wikipedia.org/wiki/JSON

Ajax Basics

open function has 3 parameters
1. method ->get,post (usually 'get' for security)
2. url
3. true/false (true - It means asynchronus request and false - it means synchronus request)


XMLHttpRequest is a javascript object performs asynchronous interaction with server

IE6 and PNG

filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(
src='image.png', sizingMethod='scale');"