FORM and JSP in the same page

Hello All
Is it possible to pass variable from a html textbox to a JSP? but they both are in the same page.
For this purpose, I have a created a index.html, which contain two frames, top.html and bottom.jsp. There is a textbox in the top.html, it collects 2 variables and use form action "POST" to call bottom.jsp to display a graph.
However after I run this page on Tomcat, it gave me error message in the bottom.html:
The server encountered an internal error () that prevented it from fulfilling this request.
Can anyone teach me how to solve this problem? Thanks a lot
Viola
index.html
===============================
(FRAME) top.html
<form action="bottom.jsp" method="post">
<input type="text" name="apple">
<input type="text" name="orange">
===============================
(FRAME) bottom.jsp
String apple = request.getParameter("apple");
String orange = request.getParameter("orange");
use those two variables to do something
and display a graph

The problem is that both pages are loaded @ the same time so when the getParameter gets executed the parameters are null and this is the probable cause of your error. Another problem is the action in form will cause the bottom to go into tops frame and not have anything to do with the other frame. If you want data to go from one frame to another while the user still sees them look @ DHTML, JavaScript and IFrames.
HTH,
J.Clancey

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