Sticky Header by ThematoSoup is the powerful WordPress plugin which provides you an easiest way to make your header navigation menu sticky i.e. visible all the time even when you scroll to very bottom of any web page. Just like Facebook & Twitter top navigation, visible all the time.
You can choose a different header image to show up according to your content. WP Display Header plugin lets you do this in a very easy way, you can select a custom header image while creating a new page, post or custom post type.