[Solved] Move Paragraph With a Button

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function centerThis() {
  document.getElementById("paragraph").style.textAlign = "center";
}
#paragraph {
  text-align:left;
  width:auto;
}
<p id="paragraph">
  <u>
    My First Paragraph
  </u>
</p>

<button onclick="centerThis()">Click me</button>

As you can see, when the button is clicked, the method centerThis() is called, and the paragraph is centered. See http://www.w3schools.com/jsref/prop_style_textalign.asp for more information. I would recommend reading about DOM manipulation.

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solved Move Paragraph With a Button