How to execute javascript after all page is shown if you cannot use defer nor onload?

Exacly:
How to delay executing of javascript if you cannot use
defer nor body onload due to output overwrites content of
page ?

Example:
I have to show flash baner from outside adsever:

<SCRIPT LANGUAGE=”JavaScript”>
document.write(‘<SCR’+’IPT LANGUAGE=”JavaScript”
SRC=”http://adserver/path/script?parameters“; ></SCR’+’IPT>’);
</SCRIPT>

but browser waits until this script is downloaded to
execute it. The page is stoped in half of lenght. User must
wait to see rest of page.

I want browser to download and execute javascript only
after all page is shown.

defer=”defer” – doesn’t work because it clears page and
draws only baner code

body onload – the same as above

What to do?

Martin

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