Ajax

Main page. Large banner. Slogan. Tabs with internal links.
Follow one of them and the page loads entirely despite the header is the same and place the user at top.
Is it possible to not to scroll the page to top and only load new page content? (AJAX? How to implement it in this theme?)

BTW, how do you search only in this forum? Two search engines I see here include other forum topics.

Thank you