How to make result of form post to jsp to appear in child frame

Question

Two frames inside a frameset, A and B (A is the first frame, B is the second). A has as it's source an html page containing a form with a submit button. The form posts to a jsp called Content.jsp. Works great, except: I want the results returned by Content.jsp to appear inside frame B. Seems like I've got the target for the form inside A wrong somehow, because when I click the submit button inside frame A, my results appear in a new browser instance, rather than inside B. Here's what the form declaration looks like:
<form action="Content.jsp" method="post" target="_parent.frames[1]">
If I make the target parent, that obviously replaces the whole page. If I make the target self, that obviously replaces the contents of frame A. I want to replace the contents of frame B. Any ideas?

Answer 1

Thanks, but I'm not using IFrame, just Frame and FrameSet. In any event, I have tried using the name attribute to no avail. Here's a really simple version of the code:
//Parent frameset
<frameset rows="50%,50%">
<frame name="A" src="testSubmit.html">
<frame name="B" src="">
</frameset>
//Here's the form in testSubmit.html
<form ACTION="testResult.html" METHOD="POST" TARGET="_parent.B">
<input TYPE="SUBMIT" VALUE="Click Me">
</form>
I've also tried TARGET="_parent.frames[1]" with the same result -- a new browser window is launched rather than the results being displayed in B.
Thanks for any assistance.