Preventing default behavior of events (Video Version)

Title:
Preventing default behavior of events (Video Version)
Description:

This is a video recording of a talk-through, uploaded to make it easier to create subtitles.
Please watch the original interactive talk-through on Khan Academy, where you can pause and edit the code
and see the code in better resolution:
http://www.khanacademy.org/computer-programming

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Video Language:
English
Duration:
04:17
http://www.youtube.com/watch?v=zdhWB_dNS-Q
Format: Youtube
Primary
Original
Added   by Pamela Fox
Format: Youtube
Primary
Original
This video is part of Amara Public.