A form to be loaded from one frame to another

Hi everybody

I got 2 frames one form (Home.aspx) is loaded into top part of the frameset.html page while other form(Buyers.aspx) into bottom part. top part (header) form has drop down menus. if I click a menu option it will be loaded into the same frame, but I want to load that(new web form) into bottom frame. so i can see top menu form always available. How can I do this?

I got 2 javascript files running at top form.

Could any body please help me?
thanks in advance
tpk

<select name="page" onchange="if (this.value) parent.frames['bottomFrame'].location.href=this.value;">
<option value="">Please select</option>
<option value="page.aspx">Page 1</option>
<option value="page2.aspx">Page 2</option>
...