User blog comment:Jr Mime/How to Change/Add/Replace Masthead Tags (Such as Admin, Founder, Bot, etc...)/@comment-452-20141129155400/@comment-4784321-20141129173249

In Javascript, commas are used to list items.

This means, if the script is reading these 2 lines:

It will read first line, continue to second line, continue to third etc.

The semi-colon on the last line says this is the end of the rights, but continue on reading the rest of the script.