how can we allow user to key-in value to combobox in php
<p>i'm a beginner.</p>

<p>currently i have a PHP form where user can either key in value in a text box or select from a combo box next to it.</p>

<p>if user choose to key in new value in the text box, it will be added as new item to the combo box.</p>

<p>my question is how can we allow user to key-in new value directly to the combo box without the need of the text box.</p>

<p>thanks.</p>
