How do I know the xmlhttprequest status during page refresh using long polling?

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C#

.NET

Ajax

I have a problem in my page that uses long polling. During page reload, an error will be displayed that says the connection was interrupted. This is because when the page was reloaded, the request was interrupted. I need to find a way on a client side where or how to know what was the http status so that I can put a logic not to display the error message.(since it is just a page reload so no I don't want the error message to show up)

What I have tried:

I have tried searching on the internet but so far what I've found was for the server side. Link-> http://goo.gl/cztISb
What I want is that, how would the client side know what was the status (if there is any), so that I can put a piece of code to removed the error message.