Using mechanize in python to navigate a website

Hi all....

I'm using pyscripter 1.7.2, on a Win XP Prof 2002 - service pack 2 machine to script a website. I have no problem logging into the site, loading and an xml file, and retrieving the confirmation transaction code xml file, but when I go to the reports page and try to grab a report, I run into a problem. The "Get Report" button code within the web page is the following:

Now I can't do a br.submit() on this button, as mechanize doesn't recognize it as "clickable". The "getReport()" function is javascript and is coded as follows:

When in the web page itself, and you click the "Get Report" button, it calls the javascript function "getReport()" and changes the action of the form itself from the following:

<action="/emkt/demand/demandBids.do?method=view">

to the following:

<action="/emkt/demand/demandBids.do?method=report">

and brings up a browser "file download" window. I would usually just do a to get the xml report file and then write it to a file. I can put in the link to the report directly thru IE7 itself and it will bring up the "file download" window, but if I try to do a br.open() directly on the reports link and try to read it....it returns an empty xml file.

Does anyone have any input on how I can handle this situation??? Is there a way to invoke the javascript from python itself?? Is there a way to change the "input type" of the button to make mechanize see it as clickable??? Should I try to change the action of the form itself??? Any input on this problem would be greatly appreciated. Thank you.