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    $("[id]").css("background-color", "yellow");
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<h1>Welcome to My Homepage</h1>

<p class="intro">My name is Donald.</p>
<p>I live in Duckburg.</p>
<p>My best friend is Mickey.</p>

Who is your favourite:
<ul id="choose">
  <li>Goofy</li>
  <li>Mickey</li>
  <li>Pluto</li>
</ul>

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