title: handle ajax error when a user clicks refresh
body: <p>i apologise if this is something i should be able to look up. all of the terms i wanted were way overloaded..</p>
  
  <p>here is my problem: when i open a page, it fires off a whole series of ajax calls. if i then press Shift+Refresh, all of those ajax calls are being considered errors, and showing their error message dialogs before the entire page itself reloads. </p>
  
  <p>so the error is being triggered by the client - is there anyway i can find out if this is the case so i can ignore it? eg in the xmlhttprequest, or in the ajax function (i am using jquery btw)</p>