Starting with jQuery 1.3.2, the function "onreadystatechange" declared in the function "ajax" has an xhr.abort() call if the input parameter "isTimeout" is set. This is called on successful Ajax calls which clears out the xhr object every time. The setInterval will pass in a value equal to the number of milliseconds late the callback is called which triggers this. From the code, I think the "if" should state (isTimeout == "timeout") since that is what is being passed in in the async section below the declaration of the state change function.

Thanks,

Thomas Poslinski