<div class="container">
<form class="form-inline" role="form">
<label class="control-label">e-mail </label>
<input type="text" name="mail" class="form-control"/>
<button type="button" class="btn btn-default disabled" id="src">Найти</button>
!!!!!вот эта кнопка ->>>>><button type="button" class="btn btn-primary">Добавить</button>
</form>