$(document).ready(function(){	
    jQuery('#form_usuarios_login').validate({
        rules: {
            login: {
                required: true
            },
            senha: {
                required: true
            }
        },
        messages: {
            login: {
                required: '<strong>Login</strong> - Campo obrigat&oacute;rio.'
            },
            senha: {
                required: '<strong>Senha</strong> - Campo obrigat&oacute;rio.'
            }
        },
        errorElement: 'div',
        errorLabelContainer: '#erro'
    });
});