What technology is used for in-page tabs?

I am not asking for a tutorial, but I am asking what type of technologies do I need to learn to understand how to create in-page tabs that are clickable, without changing the whole page.

As an example, look at these webpages.  Each one has in-page tabs that when clicked show different content on the page without changing the entire page, only the tabbed part of the page.

On this page for VMware ESXi server (http://www.vmware.com/products/esxi/), you can click on tabs for overview, features, faq, etc, without reloading the entire page.  How is this done?

Also check out www.cnet.com.  How do they have the "slideshow" that is clickable to go to a different page for each "slide"?  

What technologies are being used to accomplish these features?
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SaWeyConnect With a Mentor Commented:
As your tags say, it is done with Ajax & javascript.
CNet is using mootools (http://mootools.net/)
--> MooTabs: http://www.silverscripting.com/mootabs/
vmware is using jQuery (http://jquery.com/)
--> jQuery tabs: http://jqueryui.com/demos/tabs/

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fastfind1Author Commented:
Thank you so much.  That is exactly the info I was looking for.

Can anyone tell me what www.msn.com uses for their "slideshow" area?
I think they use something of their own
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