<select multiple id="ip_list">
<option>192.168.2.1</option>
<option>192.168.2.2</option>
</select>

<textarea name="assignedips">


</textarea>

<a href="javascript:;" id="add_ip"><img src="images/icons/add.png" align="absmiddle" border="0">Seçilenleri Ekle</a>