$('#frm_user_details').formValidation('validate');

$('#frm_user_details').formValidation({
            framework: 'bootstrap',
            fields: {
                register_first_name: {
                    validators: {
                        notEmpty: {
                            message: 'Please enter your first name'
                        }
                    }
                },
                register_last_name: {
                    validators: {
                        notEmpty: {
                            message: 'Please enter your last name'
                        }
                    }
                },
                username: {
                    validators: {
                        notEmpty: {
                            message: 'Please enter a username.'
                        },
                        remote: {
                            type: 'POST',
                            url: '/core/services/validator.php',
                            message: 'That username is already taken.',
                            delay: 500
                        }
                    }
                },
                register_password: {
                    validators: {
                        notEmpty: {
                            message: 'The password is required and cannot be empty'
                        },
                        identical: {
                            field: 'register_password_retyped',
                            message: 'The password and its confirm must be the same'
                        }
                    }
                },
                register_password_retyped: {
                    validators: {
                        notEmpty: {
                            message: 'The confirm password is required and cannot be empty'
                        },
                        identical: {
                            field: 'register_password',
                            message: 'The password and its confirm must be the same'
                        }
                    }
                },

            },
            onError: function(e) {
                e.preventDefault();
                $('#create_account').removeClass('button-disabled');
            },
            onSuccess: function(e) {
                e.preventDefault();
                $('#create_account').addClass('button-disabled');
                    THIS.services.submitHandler();
                }
            }
        });

$(formSelector).formValidation({
    live : disabled,
   //other properties

$(document).ready(function() {
    $('<your_selector>').formValidation({
        live : 'disabled'
    });
});