Displaying a text field only if a particular value is selected
<p>I've created a dropdown list that contains 3 values:</p>

<ul>
<li>date wise</li>
<li>active students</li>
<li>inactive student</li>
</ul>

<p>How can I select a text field asking what the date of birth of the user is, if and only if the person has selected the "date" field?</p>
