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put Powerpoint presentatiion on web

Directly embedding PowerPoint files in Web pages is inapplicable. It always occurs compatibility issues in PowerPoint. It's very unfriendly

But you have another 2 options to do that

1. Save powerpoint as a html webpage
PowerPoint has a native feature to save a prentation as a html
webpage.
PowerPoint ->Save As-> Web page

This is good for a text-based presentation. If you have a lot
animations, transtions or other, the file may not played correctly in
the webbrowser.

2. Convert PowerPoint to Flash
If you can convert powerpoint to flash, then you can insert this
flash to a webpage.
Actually, you can retain animiations, transitions and embeded video in
the converted flash.

How to convert PowerPoint to flash
http://www.sameshow.com/forum/viewtopic.php?t=2141

I prefer the latter method. by that way, the specail effects of your PowerPoint presentation can be remained, and the vistors can view then presentation on line

Enjoy it!