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Waveform Audio File Format  |  2000-11-13  |  229.2 KB  |  1 channel  |  22,050 sample rate  |  21 seconds
Transcription: Let's add a JavaScript to the document you just created so that users can decide whether to view layer 4. The position of the four layers has been changed slightly to make room at the top of the page for two buttons. For this exercise, a script tag has been added to the head element of the document. Start by adding a function called showLayer.