Ajax initial experience-Ajax ie Cache

Get started with learning about Ajax.
After reading the introduction from msdn-su Peng, I felt really good.

Better User Experience and higher performance...

The first time I started writing my own Ajax code today, I encountered a very amazing problem ....
When I use the get method to submit a request
Every time it was the first time, data could not be obtained after it.

Later, I checked other related information to find out that this was caused by the data cached by IE.

Summary:
XMLHTTP. Open (string method, string URL, Boolean flag );
If method = get is used in IE, two identical query strings are cached. Therefore, you must use a function to control query strings.
This problem won't occur in ff.

Continue to learn about Ajax and learn more about XML and JavaScript.

However, I still cannot find a good JavaScript help document .........

Do you have any complete documents or can you share them? Grateful