I used your example code from Chapter 2 called "XMLHttpExample1.htm" and it works as coded. Then, just for fun, I changed

            oXmlHttp.open("get", "GetCustomerData.php?id=" + sId, true);
to
            oXmlHttp.open("get", "GetCustomerData.php?id=" + sId, false);

The code now stops working. The module "GetCustomerData.php" never get invoked.

Why?

I should mention that this does work on other browsers, but not on Firefox 2.0.0.3 on the Mac.

Is there a know problem with this browser on this platform?

Thanks.