I tried to put this in help12.htm for testing since it had a left & main
set of frames to begin with.

<!-- help68.htm, Both don't work in NS6.0 -->
<title>help68.htm, Only One submit works in NS6.0</title>
sub-title? Two frames loaded at once.


var f = document.InfoForm; 
f.action = "WelcomePage.asp"; 
f.target = "body_frame"; 
f.submit(); 
f.action = "mainleft.asp"; 
f.target = "leftFrame"; 
f.submit(); 

My solution which works in both browsers:

function NewPages() {
  // help68.htm, Only One submit works in NS6.0
  parent.right.location = "help12a.htm";
  parent.left.location = "index.htm";
}