This past weekend celebrated the 49th anniversary of the Equal Pay Act, the law designed to end wage discrimination based on gender. It's something we take for granted now, but do you realize there was a time when even a superhero like Batgirl couldn't catch a break? Keep that in mind when you preorder your ticket for Dark Knight Rises.

Vintage PSA for the Equal Pay Act...Starring Batgirl! [Sociological Images]