Using responsive design, is there a way to skip loading the background image for smaller screens? I have a big background image that loads for desktop browsers just fine (fills up any extra side margin space from our fixed-width design) but for mobile users, it's really just a waste of bandwidth since they never see it anyway (because there is no extra side margin space to view it). So can I save mobile users a big image load by just disabling the HTML / Background image setting for small screens? If so, how can I accomplish this? Thanks!