Not sure I understand what you're after here - do you mean you want the ability from the main page to be able to refresh the contents of the iframe? If so all you need to do is stick something like this somewhere on your main page:
PHP Code:
<a href="your iframe page" target="your iframe name">Click Here To Refresh</a>
"Your iframe page" is the src part, and "your iframe name" is the name part of your <iframe ... > tag so if your iframe tag looked like this:
PHP Code:
<iframe src="iframepage.php" name="myiframepage"></iframe>
then your refresh code would be
PHP Code:
<a href="iframepage.php" target="myiframepage">Click Here To Refresh</a>
If you look at my site you should be able to see something similar happening with the iframe box top left and the links to change it from "links", "submit", "headlines", and "options"
Of course, if this isn't what you meant you'll need to clarify it a bit.
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