Before somedays i started a thread saying that want to learn PHP and i got good response here and now i feel that i am somewhat good with PHP,,,, the next is AJAX,,,,, give some tips for starting with AJAX, and please say me some books which deals with AJAX examples explained step by step,,, BTW, i don't know javascript,,,,,,,
To learn AJAX you need to know Javascript first. Best and easiest way to learn Javascript is 'Head First Javascript'. You can also have simple understanding on Javascript and start learning AJAX. Search for tutorials in google. AJAX is not big topic to learn. Few lines of javascript and how it works is enough.
You don't necessarily need to know javascript in order to utilise AJAX. ASP.NET provides plenty of built-in AJAX controls that allow you to use AJAX without any javascript knowledge. It is also a great platform for server-side development, and should be easy to learn if you have some programming experience. But knowledge of javascript is definately an advantage anyway, and I would suggest that you learn it regardless of what you choose to use for server-side dev.