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January 18, 2002 Asynchronous XML Loading  Tips: January 2002
Yehuda Shiran, Ph.D.
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By default, when you ask JavaScript
to load an XML file, the browser won't wait for the loading to complete and will
run the next line of the script. To ask the browser to wait for the loading to
complete, assign the async
property to false.
Here is a script segment that does it:
async
to true
(default), the browser will run the script in parallel while loading the XML file.
To control the loading process, the readyState
variable provides four different states that describe the status of the file:
1 (before loading), 2 (trying), 3 (parsing successful), and 4 (loading successful).
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