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:
Thurs: 9am vs Archer, 1:00 vs Windthorst - both @ Windthorst, Fri: 11 vs Petrolia 1:00 vs Alvord - both at Windthorst, Sat: 9am vs Stamford @ Windthorst.