title: How can I use jQuery to make an input readonly?
body: <p>I have the following input:</p>
  
  <pre><code>  &lt;input id="fieldName" name="fieldName" type="text" class="text_box" value="Firstname"/&gt;
  </code></pre>
  
  <p>How can I use jQuery to make this element a read-only input without changing the element or its value?</p>