content: -- http://developer.apple.com/library/mac/#documentation/applescript/conceptual/applescriptlangguide/reference/ASLR_control_statements.html
  
  
  try
  	display alert "Hello" buttons {"Cancel", "Yes", "No"} cancel button 1
  on error errText number errNum
  	if (errNum is equal to -128) then
  		-- User cancelled.
  		display dialog "User cancelled."
  	else
  		display dialog "Some other error: " & errNum & return & errText
  	end if
  end try
  