Is it possible to add custom HTTP header to ajax request?

What is the difference between the XMLHttpRequest object's .status and .statusText attributes?

What is the purpose of Ajax long-polling?

For the "same origin policy" to always allow an Ajax request, what attributes must be the same between the requesting context and the server?

What is the preferred method for maintaining back/forward button and crawler functionality in Ajax-driven web applications?

Which HTML5 feature can improve the experience of a user using the "back" and "forward" buttons when using AJAX techniques?

How can you stop jQuery AJAX response from being cached?

Which object shares a powerful set of methods that can be used to expedite communications between the client and server?

Can the XMLHttpRequest object be disabled via browser settings?

Which answer is correct in order to send the following data with request?

Why would a public api return a non valid json like this? for(;;); {'key1':val1,'key2': 'val2'}