Hello firend

Thanks for your answer,

I have a question about gmail.

when I recieve new email from AJAX,Without any refresh it shows me I recieve new email and number of add one to number of email in inbox.

I want to know how gmail do that?

Is it by AJAX?
When we use AJAX,User does something ,And after user did an action on interface ,then interface will change,But in this case it shows me without any refresh or without any action on interface,Please know ne if you know any tutorial about this case.

Thanks in advance