Calling a FLEX application from html, using parameters

Question

Hi guys,
I have this html:
<form name="getTracing" method="POST" action="http://syyzas400/ShipmentInquiry/ShipmentDetails.html">
          QuickTrace 
<input type="text" name="TrackNbr" size="14" tabindex="1" maxlength="11">
<br>
Carrier        
<select name="Carrier" tabindex="2" style="background-color: #D8E4FF; color: black;
                         font-family: Arial; font-weight: bold; font-size: 9pt; width=114">
          <option>Option1
          <option>Option2
          <option>Option3
</select>
As you can notice, there is an Input field ("TrackNbr") and a selection field ("Carrier") with three options... The user enters a Tracking Nbr.
in first field  and chooses one of the three options from the second field and hits <enter>. In this moment, as you can see from "action" area, an html (part of a FLEX application) is called. The problem is that the parameters ("TrackNbr" and "Carrier") are not transmitted and I don't know how to do that.
This FLEX application accepts parameters using URL fragments technique (because could be called from another FLEX application, too)
but obviously this cannot work with the above described form.
I read about External Interface class, but everybody is talking about calling ActionScript functions, not FLEX applications. Being a newbie in this area,
I am sure I am missing something, but what?
Any help would be very appreciated, as usual...
Florin

Answer 1

Problem solved.
I got rid of the form tag (and "action", obviously); instead, I created a JavaScript function used for onClick event of the submit button. Inside this function, I captured the values (using getElementById method) of the input and select field and, using these values, I created the URL for my FLEX application (used with location.href property), and BAM! Everything works like a charm... I am even able to use the Back button to exit the FLEX app and return to the selection screen.
Now my question is, why does it work??? No complaints at all, just curiosity... I didn't use External Interface class, no exposed ActionScript functions prior calling frm JavaScript, no fancy stuff all sites I saw talking about...
Grizz..., I have a feeling that what you described above is a simpler and more advanced way to do about the same thing I did; am I right?
Thanks,
Florin