Debugging challenge

Spot the fault...

Assessment for the subject: Locating equipment, system and software faults will consist of a document listing various JavaScript faults, how they present themselves, what caused the error and how to fix it.

Run through this list of debugging challenges and choose 2 or 3 from each section: Lexical Errors; Syntactic Errors; Execution Errors; Logic Errors. Write up a short description of the problem (how it presented itself), what you found and how you fixed it. Screenshots would be handy.

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Original image: 'Fixed' http://www.flickr.com/photos/27384730@N00/109566859
by: Mike Fernwood