$.Get callback function behavior in Firefox

$.Get callback function behavior in Firefox

Hi, I am brand new to java script and jQuery.  I am using $.Get() to do an ajax request and call a callback function to evaluate the returned data.  In the callback function, I might display a confirm box if the returned data meets certain conditions.  My problem is this:  when the callback routine displays the confirm box, it seems as if Firefox doesn't stop execution at that point.  The java script function that issues the $.Get() request does a 2nd $.Get() request right after the first one.  The 2nd request displays an alert box in it's callback function.  What is happening is the confirm box is displayed and immediately the alert box is displayed.  FF doesn't wait for the confirm box to be responded to before moving on the the 2nd $.Get() request.  Internet Explorer handles this ok by waiting for the confirm box before going on?  Is this a known problem with FF?
Thanks
Ray