title: Remove text from html node with jQuery/Javascript
body: <p>I need to delete text from a html node, but keep the inner HTML
  Anyone who knows how to do this?</p>
  
  <p><strong>Example</strong>:</p>
  
  <pre><code>&lt;td class="ms-list-addnew"&gt;
     &lt;a class="ms-herocl" id="idHPNewDocument"&gt;&lt;span&gt;new document&lt;/span&gt;&lt;/a&gt;
     or drag files here
  &lt;/td&gt;
  </code></pre>
  
  <p><strong>Needed result</strong> (remove the " or drag files here"):</p>
  
  <pre><code>&lt;td class="ms-list-addnew"&gt;
     &lt;a class="ms-herocl" id="idHPNewDocument"&gt;&lt;span&gt;new document&lt;/span&gt;&lt;/a&gt;
  &lt;/td&gt;
  </code></pre>