Operational-Transformation/ot.js — pull request #17 by mikelehen (2013-03-17 21:15:40+00:00)
Title: Draw other people's cursor's behind CodeMirror surface.

Set z-index of other cursors to -1 so they don't interfere with codemirror's click handlers. Without this, if you click on/around somebody else's cursor your cursor won't move since the click is going to the pre element instead of to CodeMirror.