I’ve been asked if I can build a site similar to the NPR “White Lies” site with parallax images (background images that stay put as html scrolls up or down) that fade in an out. I had built a site using parallax, www.mobilysis.com, which defined a series of css classes I named parallax and embedded them in place using HTML markup items. I’m wondering if there’s a way to make the parallax images fade in and out.