I guess it's not really a drop-down but it looks like a drop-down with all the values "selected" or viewable on page-load. I am not sure of the correct HTML to create it. Here's a picture.
You're looking for the size
attribute of the select
element.
If the value of the size attribute is greater than 1, then all options are displayed in a scrollable pane. Otherwise you get the classic dropdown.
<select size="5">
<option>Report A</option>
<option>Report B</option>
<option>Report C</option>
<option>Report D</option>
</select>
Alternatively, you can use the multiple
attribute which will set size
to a default value of 4.