title: Why Can't we add id attribute to <img> tag?
body: <p>Whenever We add <code>id</code> attribute to the <code>&lt;img&gt;</code> tag, the image does not show up.</p>
  
  <p>for eg. </p>
  
  <p><code>&lt;img src="something.jpg" id="sidebarAd"&gt;</code></p>
  
  <p>This Image will not show up. Also, If I Place in it a <code>&lt;div&gt;</code> as well. It will not work. For E.g.</p>
  
  <pre><code>&lt;div id="sidebarAd"&gt;
  &lt;img src="something.jpg"&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>But, if i use a class tag. Everything works like a charm. Why does this happen ?</p>