To get the tracks and be able to remove them, we will first create few buttons as shown in the figure 10 above. This will create 6 buttons with the specified IDs. We will be clicking on the buttons to get the tracks used for audio and video as well as getting information about the tracks and their removal. When this is done correctly the html document should look as shown in the next picture
We will use the buttons in the next script based on the IDs we have used to create functions that can make use of the tracks.