Try this for example, this will show a GDI calculator I wrote on a page. Of course you will have to write your own as this also includes advert income and product sales. But if you cut and paste this code, save the file as test.html you will see the calculator. You can try this on your desktop, you do not need to upload it.
<html>
<body>
Here is a title and some text, below is the IFRAME
<p>
<iframe width=850 height=200 src=http://pubtricks.com/gdicalc.php frameborder=0 marginwidth=0 marginheight=0>
</iframe>
<p>
Here is some more text at the bottom of the page
</body>
</html>
If you try this code you will see how you can use standard HTML at the top and bottom and advanced PHP code in the middle via IFRAMES to another server. I hope this makes sense and you can use this information to make a more interactive WS sites.
