form_6_elements_postfix_button.html

<div class="row">
    <div class="small-12 columns">
        <label for="username">User name</label>
    </div>
</div>
<div class="row collapse">
    <div class="small-9 columns">
        <input type="text" id="username" name="username"></input>
    </div>
    <div class="small-3 columns">
        <a href="#" class="button postfix">Check availability</a>
    </div>
</div>