title: How To merge two divs to one div
body: <p>I have two divs </p>
  
  <pre><code>&lt;div id = "first"&gt;some details111&lt;/div&gt;
  </code></pre>
  
  <p>and</p>
  
  <pre><code>&lt;div id = "second"&gt;some details222&lt;/div&gt;
  </code></pre>
  
  <p>I want to create:</p>
  
  <pre><code>&lt;div id ="New"&gt;some details111 some details222&lt;/div&gt;
  </code></pre>
  
  <p>What is the best and the fast way to do it?</p>