<form method="post">
        <input type="text" name="domnam" placeholder="Domain name"> </input>


        <select class="sel">
         <option value="Subdomain">Subdomain</option>
         <option value="IP">IP</option>
         <option value="WhoIS">WhoIS</option>
         <option value="Alexa">Alexa</option>
        </select>

         <input type="submit" value="Check" class="submitter"></input>
     </form>