What is the correct way to execute the function "calc()" when an XMLHttpRequest is loaded?

Which is/are true regarding AJAX?

Can AJAX be used with offline pages?

Which is a block comment in JavaScript?

It might be needed to set the request content-type to XML explicitly. How can you do so for an XMLHttpRequest Object?

Is it always possible to make requests to multiple websites with different domain names from an AJAX client script?

Can an AJAX response set a cookie?

Which JavaScript object performs asynchronous interaction with the server?

Which XMLHttpRequest properties are correct?

Which is not a valid data type that AJAX expects to get from server?

A callback function is a function passed as a parameter to another function.