Does it really need javascript ?
Say that within the top/ parent/ main window,
you have named the bottom 4th frame as "status":
Code:
<!doctype html public "-//w3c//dtd html 4.01 frameset//en"
"http://www.w3.org/tr/html4/frameset.dtd">
<html>
<head>
</head>
<frameset rows="50%, 50%">
<frameset cols="30%, 30%, 40%">
<frame src="form_1.php">
<frame src="form_2.php">
<frame src="form_3.php">
</frameset>
<frame name="status" src="status.html">
</frameset>
</html>
and on each of those top frames' files define target="status":
Code:
<form method="get" action="form_x.php" target="status">
your name: <input type="text" name="yname">
<input type="submit">
</form>