title: how to submit input with image type
body: <p>I can submit input with type "submit" but once I changed it to "image" it doesn't submit.</p>
  
  <p><strong>Works with submit:</strong></p>
  
  <pre><code>&lt;FORM ACTION="balance.php" METHOD="POST" enctype="multipart/form-data"&gt;
      &lt;input name="addBal" type="submit"/&gt;
      &lt;/form&gt;
  </code></pre>
  
  <p><strong>Doesn't work with image:</strong></p>
  
  <pre><code>&lt;FORM ACTION="balance.php" METHOD="POST" enctype="multipart/form-data"&gt;
      &lt;input name="addBal" src="pics/add.png" type="image"/&gt;
      &lt;/form&gt;
  </code></pre>
  
  <p><strong>Output end (balance.php):</strong></p>
  
  <pre><code>if(isset($_POST['addBal'])) {
      echo 'TESTER';
  }
  </code></pre>
  
  <p><strong>I've made a typo: but the problem still remains. Type submit works, and image doesn't</strong></p>