For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
Winter Sings 9:30 Performance - Stokes, Noble, Compton, Trent, Gonzales, Nimitarnun, Berman 10:45 Performance - Luna, Cloud, Craine, Monson, Soderborg, Brown, Weill 12:45 Performance - Allison, Marsh, Judy, Hammer, Gallup, Bruski, Carrington, Alker