img.bg {
          /* Set rules to fill background */
          min-height: 100%;

          /* Set up proportionate scaling */
          height: 100%;

          /* Set up positioning */
          position: fixed;
          top: 0;
          left: 0;
          }

@media screen and (max-width: 1024px) {
		  /* Specific to this particular image */
		  img.bg {
		  		left: 50%;
		  		margin-left: -512px;  /* 50% */
		  		}
		  }
		  
img.b2g {
          /* Set rules to fill background */
          min-height: 100%;

          /* Set up proportionate scaling */
		  height:auto !important;
          height: 100%;

          /* Set up positioning */
          position: fixed;
          top: 0;
          left: 0;
          }