insert every element into new line

insert every element into new line

Hi to all, 
Any idea on how to insert every new element into new line? (ATM it starts in a line and then it fills the whole line with elements, and i want to put 1 per line

The element is select list:

                  <select id="end" > 
                              <option.......>...</>
                  </select>

The button used to add new object:
<input type="button" id="add" value="Add"/>

This is the jquery part:

<script type="text/javascript">
          $(document).ready(function(){
                 $("#add").click(function(){
                     var newselect = $("#end").clone();
                     $(newselect).attr("id","via");
                     $(newselect).appendTo($("#destinations"));
                });
            });
            document.getElementById("add").onclick = function(){
            }
</script>