html and cgi: response to one frame of a frameset

I want to build a model retrieval system like NTU 3D model retrieval system. In my index.html: <frameset cols="25%, 75%"> <frame name="query_frame" src="query.html"> <frame name="resutls.frame" src="introPage.html"> </frameset> query.html: <form enctype="multipart/form-data" action="cgi-bin/processQuery.cgi" method="post"> <input id="fileupload" name="myfile" type="file"> <input type="submit" value="Load this file"> </form> My page then looks like this: After loading the file, I want to achieve this goal: 1. Remain the frameset structure. 2. Left frame remains unchanged. 3. Right frame show the results. Just like this. I do not have much idea how to write my action part: processQuery.cgi. But a simple file: #!/usr/bin/python html=""" ... <p>hello</p> ... """ print html makes the response page looks like this: