i want to click the option something like this..
JS
$("#practice-area optgroup option").click(function(){
// code function here
});
HTML
<select name="practice-area" id="practice-area">
<option value="0">Select</option>
<optgroup label="NSW">
<option value="1397">Armidale</option>
</optgroup>
<optgroup label="NT">
<option value="1402">Darwin</option>
</optgroup>
</select>