i had a transparent iframe, buh i don't want it transparent any more so i changed the code to

<iframe name="midContent" src="updates.html" frameborder="0" width="600" height="800" style="border: 0" marginwidth="0" marginheight="0" scrolling="auto"></iframe>

but it still appears transparent, y is tht?

clear your browser cache

aye possibly cache, do you have it online - maybe we can take a look.