Edit in JSFiddle

form label, form input {
    display: block;
    margin: 0 0 10px 0;
}
form input {
  height: 20px;   
}

label.error {
    border: 1px solid red;
    color: red;
    font-weight: bold;
    padding: 3px;
    background-color: #99CCFF;
    margin: 6px 0;
    width: 120px;
    text-align: center;
}
<script type="text/javascript" type="javascript" src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.js"></script>
<form id="validate" action="validate.html" method="post" name="validate">

<label for="nome">Nome:</label>
<input type="text" name="nome" />

<label for="idade">Idade:</label>
<input type="text" name="idade" />

<label for="email">E-mail:</label>
<input type="text" name="email" />

<label for="pais">PaĆ­s:</label>

<select name="pais"> <option value="">Selecione</option> <option value="brasil">Brasil</option> <option value="canada">Inglaterra</option> </select><input type="submit" value="Validar" />

</form>