This looks much better than using the alert boxes, although, unfortuantely the messages can
sometimes be slightly obscured because the prompt dialog darkens the screen slightly when
it is open. Don't worry about this, because we'll not be using prompts for much longer.
Now we have successfully moved away from using alert dialogs to update the user and
started to dynamically update the markup on the page instead. This task was made much
easier by the fact that we already had functions for these jobs, meaning that all we had to
do was update our functions to use the DOM instead of alerts.
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