For a simple iframe demo, you can try the below html page as a test. Load the meta refresh server code into the arduino. Copy the below code and paste into notepad. Change the 192.168.1.102:84 in the html page to what you have for your arduino server. Save the the notepad html as frame.htm on the desktop, then open with a browser. Then you should be able to see how the meta refresh works in a frame and how it can be stopped and started with the simple buttons.
<HTML>
<HEAD>
<TITLE>Zoomkat's iframe refresh test</TITLE>
</HEAD>
Zoomkat's iframe refresh test 5/1/12
Get analog data from arduino:
|<a href='http://192.168.1.102:84' target='DataBox'
title='SSC-32 version'>REFRESH</a>|
<a href='http://web.comporium.net/~shb/pix/82_0_550.jpg' target='DataBox'
title='Voltage on A analog input'>STOP</a>|
<iframe src='http://192.168.1.102:84' width='30%' height='300'
name='DataBox'>
</iframe>
</HTML>