Mayan Religion

I was reading about the Mayan religion, and I found some interesting things on this website:
http://www.wsu.edu/~dee/CIVAMRCA/MAYAS.HTM

I used this site to find information about religion, sacrifice and The Mayan calendar system. But in addition to those topics, this site has information about Economy, History, and the Region.
I found out that Mayans sacrificed to the gods because they believed that the gods needed their support to be able to uphold the duties of the Gods, and without their support, they would not respond to the people. Some mayan citizens actually had to rip their own heart out and give it to the gods. You would think many people wouldn't be willing to do this, but that is not the case. People would want to be a sacrifice because if they were, they would go to the afterlife, as for everyone else, they would go to hell.