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Next, you need to decide what you want to do after you receive the server response to your request. At this stage, you just need to tell the HTTP request object which JavaScript function will handle processing the response. This is done by setting the onreadystatechange property of the object to the name of the JavaScript function that should be called when the state of the request changes, like this:

httpRequest.onreadystatechange = nameOfTheFunction;

Note that there are no parentheses after the function name and no parameters passed, because you're simply assigning a reference to the function, rather than actually calling it. Al