#g-page-surround { 
  background: url(login.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

#g-header,
#g-footer,
#g-main .g-container, #g-main.g-container,
#g-copyright,
.alert,
.well {
    background: none !important;
}