This is just an example. You can set this frame, called "slide1.htm," to show any page from the Internet. It can be an image or an HTML page. It doesn't matter.
This web page uses frames (in this situation, two windows). Here's how it works. There's a main file called "index.htm" -- it contains the title of the page and the setup for a "frameset", i.e., a set of frames. The index page defines the size and name of each frame. In this case there are two frames. The thinner one on the left is named "text" and the wider one on the right (the one you're reading right now) is named "slides."
The index page also defines the source of each frame; that is, what is displayed in each frame. This can be a web page or just an image. In this case, we assume the left frame will be the text of your presentation and the right frame will contain your first "slide." Currently, the left "text" frame points to a file called "text.htm" and the right "slides" frame points to a file called "slide1.htm," the first display in the presentation.
You edit the "text.htm" file to provide links to your subsequent slides. Again, these slides can be anywhere on the internet. But here's the trick: when you create the link to the slide, provide a "target" with the name "slides". Then, when you click on the link, the linked file will open up in the "slides" frame, which was its "target."
So your HTML link for an abstract slide might look like this:
<a href="abstract.htm" target="slides">
Or you might want to have your abstract appear as "slide1.htm" when you open the presentation.
Graphic editors like Dreamweaver and Contribute also allow you to define a target when you create a link.