I try to implement the following code
<div class="functionitem" id="selector_cat">
<select name="sets" style="overflow:auto;width:100px;">
<option value="general">happy holiday</option>
<option value="garden">Garden</option>
<option value="Lunch">Lunch</option>
<option value="nice day">A nice day out with my friend on the beach</option>
</select>
</div>
See Question&Answers more detail:os