How to Change a Background Dynamically in a Website. Using CSS and JavaScript, you can dynamically change the background on your website.

Add a short CSS class to an HTML Web page to use animated and stationary GIF images as the page's background.

Google's John Mueller reminded us that when it comes to your CSS background images, Google won't be indexing or ranking those images in image search. John Mueller said on Twitter "last I checked ...

How to change your Google browser background image Note that this will only change the background for the New Tab page, which is the page that loads when you open a new blank tab or window.

Google's John Mueller said this morning in a webmaster hangout at the 20:55 mark that Google Image search does not index and rank images from CSS background code. He said if you want your images ...

Today, Google is taking that a step further: it's now featuring a background image by default on its homepage, even for users who haven't activated the new feature.