Is it possible to define primary and hover images for an  <input type="image"> element in CSS in JS? I'm trying to implement a different image on hover, but can't get the syntax correct.
    margin: 40,
    background: "url(/btn_google_signin_light_normal_web.png)",
    "&:hover": {
      background: "url(/btn_google_signin_light_focus_web.png)"
    }
  }
 
    