which web language ?

[dot_rain]

when you click on a link or button in navigation bar , only 1 part of the page is loaded with new content , the rest of the page doesn't load ( usually is narviagation bar ) . is it CSS or something ?
thank you.

[Ranger56]

Like an iframe?

http://www.w3schools.com/tags/tag_iframe.asp

[dweed-Ly]

php and css are best to do that.

[rmedek]

only 1 part of the page is loaded with new content , the rest of the page doesn't load
A frame or an iframe is what you're probably after. PHP is a good way to insert content in page without needing to code separately for each page (via includes) but you'd still have to load the entire page. I think PHP (or another server-side type of language like ASP or CFM) is a better choice than a frame, if you're interested in learning it.

CSS only affects the style of a page, not the content.