[Javascript] AJAX app causing excessive browser memory usage

[Rick Emery]

Quoting Jonathan Buchanan <jonathan.buchanan at gmail.com>:

> The problem in this case is that when handleXHRResponse() is called,
> "this" no longer refers to your xhrObj instance. You can use the
> built-in call[1] or apply[2] functions to execute the function in the
> scope of your xhrObj instance.

Just a quick note to say "thanks". I had worked around this by  
creating the xmlhttprequest object as a property of the window object.  
But I also needed access to some other properties of my custom object  
from the response handler, so I finally got around to sitting down  
with your example and understanding it. The application is now working  
as expected.

Thanks again!
Rick
-- 
Rick Emery

"When once you have tasted flight, you will forever walk the Earth
  with your eyes turned skyward, for there you have been, and there
  you will always long to return"
                                               -- Leonardo Da Vinci