Validar Select

Validar Select

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css">
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
<select name="markup" id="markup" class="markup" >
	<option selected="selected" value="8">Selecione Plano</option>
	<option value="Um">Plano Um</option>
    <option value="Dois">Plano Dois</option>
    <option value="Tres">Plano Três</option>
</select>
<br/>
<input type="submit" name="enviar" id="btnBloqueioSalvar" value="Enviar"/>

JavaScript

$('#btnBloqueioSalvar').on('click',function(){
$('#markup').each(function(){
	if($(this).val() == 8){
		alert('Selecione um plano.');
	}
    else{
        alert('Plano '+$(this).val()+' selecionado com sucesso.')
    }
})
})