When you 'save as' there should be a "save as type" box?

Look down in that to find the html option.

You may want to check here.
From PowerPoint to the Web
http://www.pptfaq.com/FAQ00214.htm as well as here http://www.pptfaq.com/FAQ00241.htm

 Hi, Could anyone tell me how i can get a power point slide show on our
 website.? Ive been told to save the slide show in html format, but i cant
 seem to find how to do that. When i click save as, there is no option for
 it.... any help gratefully received

 thank you
 Kala.

What version of PowerPoint do you have?

-----------------------------------------
Steve Rindsberg, PPT MVP
PPT FAQ:  www.pptfaq.com
PPTools:  www.pptools.com
================================================

Hi.
Power point slide can't show sucessfully on website. You can convert
your powerpoint to flash ( with PPT2FLASH ), falsh can show on
website. At the same time the flash you convert retain the original
animation and transition of the powerpoint.
Download the software and try it.
http://www.sameshow.com/powerpoint-to-flash.html

Good luck!

Hi!
Generally, PPT file can't insert into webpage directly. Only we can do
is save the PPT file as html format, and then we can see the PPT file
on website. But the animation, transitions, hyperlinks and sound
tracks from PPT are not retained in the webpage. So, we can't have the
advantage PowerPoint bringing us.
Considering the special features which support many different
platforms and smaller size the FLASH possess, we can convert
PowerPoint to FLASH. In that way, we can combine the features between
PowerPoint and FLASH at the same time. Once I used PPT2FLASH (
http://www.sameshow.com/powerpoint-to-flash.html ) to convert my PPT
to FLASH, the converted FLASH can upload to website conveniently and
the effect is good. By the way, except the animations and transitions
the converted flash retained, we can use the software to make banners
for webpage and create photo album easily.
Good luck.
If you have problems, you can contact me through Email.