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Miscellaneous tips and tricks

• HOWTO determine the browser name and version number
• HOWTO detect whether the user has Flash installed (goog.userAgent.flash)
• HOWTO filter elements by both tag and class name
• HOWTO determine if a JavaScript variable is undefined
• HOWTO slice an array that's not really an Array (goog.array.slice)
• HOWTO splice an array that's not really an Array (goog.array.splice)
• HOWTO make IE apply style to unknown elements