I find this tutorial in 9lessons.com : http://www.9lessons.info/2011/01/gravity-registration-form-with-jquery.html
It’s about a registration form with validation.

I want to send data to DB.
// Submit button action
$('#submit').click(function()
{
var email=$("#email").val();
var username=$("#username").val();
var password=$("#password").val();
if(ck_email.test(email) && ck_username.test(username) && ck_password.test(password) )
{
$("#form").show().html("<h1>Thank you!</h1>");
///// if OK
///// Show thanks
//// else
//// Error, try again
}
return false;
});
How can I do ?? I searched in internet in jQuery tutorial and I find much codes …
This tutorial will walk you the entire process:
http://net.tutsplus.com/tutorials/javascript-ajax/submit-a-form-without-page-refresh-using-jquery/
It implements jQuery.post and calls a PHP script that will allow you to process the data.