failure submitting nonvisible editor(s)

I am simply bumping the message below from someone that posted this a while ago. I am having the exact same problem. Does anyone have a solution ?

many thanks.
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I just created a html page with 5 editors in it.
They are quite large, so when I press 'end', I jump to the bottom of the page (where the submit button lives), thus skipping 2 or 3 editors (they never come into view, just skipped).

In the onsubmit event code of the page I have the following code for the editors:
document.forms['xxxx'].elements['test1'].value = document.frames["instanceName"].objContent.DOM.body.innerHTML;

When i now press the submit button, IE complains that there was an unexpected call of a method or property(translated from dutch).

But, in case i fill in all editors and then press the button, everything is fine. (This is because I brought all editors into view).

I discovered that for those non-visible editors the DocumentComplete event is never fired. Thus only the iframe which you see ON the screen is loaded & fired.

Does anybody know a solution to this annoying problem?
E.g. a force-load of all iframes.