Onchange Code Execution Delay In IE?

have a select element that has a function attached via onchange. The function does some AJAX using the HTML_AJAX library.

When I use Firefox, if I select an item in the list, then the code executes in a timely manner, which means that I see lines 1 and 2 of my debugging output (displayed at the end of this posting). The code then displays a wait window. A second or so later, I see the third and final line of debugging output when the AJAX call has completed. The wait window then disappears. Yaay!

However (and you knew that this was coming even without the "IE" tag in the subject header, didn't you?), with Internet Explorer, I see no debug output nor wait window until AFTER the AJAX call has completed one second or so later. Suddenly, every line of debug output is displayed and the code is executed. Boo!

"Hold on! Are you saying that your Javascript code isn't being executed until after the AJAX call?"

This is what I am seeing with Internet Explorer! Even if I insert an alert() message in the code, I do not see it until AFTER the AJAX call has completed, even though it appears in the code before the AJAX call. Then, I see my alert() message. I do not see the wait window because it is displayed and immediately closed during the rush of code that executes after the AJAX call has completed. The whole idea of the wait window is to display while the AJAX call is working.

Here is the code for the select element:

HTML Code:
<select id="txtfieldNbNights" tabindex="4"
onblur="return ValidNbNights(this, 4, true);"
onchange="return OnNbNightsChanged(this);">

[Code]....