Is it possible to set the equivalent of a src attribute of an img tag in CSS?

Question

Is it possible to set the src attribute value in CSS? At present, what I am doing is:

Answer 1

I would add this: background image could be also positioned with background-position: x y; (x horizontal y vertical). (..) My case, CSS:

(..) 
#header {
  height: 100px; 
  background-image: url(http://.../head6.jpg); 
  background-position: center; 
  background-repeat: no-repeat; 
  background-color: grey; 
  (..)
} 
(...)