field validation

field.js

    var validate = {
        /**
        * Username value check: must contain a lower and upper case letter and at least 1 number. Cannot contain special characters.
        * @param field {NodeObject} the field object
        * @return {boolean} the result of validation
        */   
        username: function(field){
            //Regex statements are broken into parts for ease of maintenance.
            var reUsernameUpperCase = /[A-Z]/,
                reUsernameLowerCase = /[a-z]/,
                reUsernameNumber    = /[0-9]/,
                reUsernameSpecial   = /[^a-zA-Z0-9]/;
            
            var usernameValue = field.get("value");
            
            if(reUsernameUpperCase.test(usernameValue) && reUsernameLowerCase.test(usernameValue) && reUsernameNumber.test(usernameValue)){
                if(!reUsernameSpecial.test(usernameValue)){
                    return true;
                }else{
                    return false;
                }
            }else{
                return false;
            }
        },
        /**
        * Password value check: must contain at least 2 numbers and be 8 to 15 characters in length
        * @param field {NodeObject} the field object
        * @return {boolean} the result of validation
        */
        password: function(field){
            var rePassword = /^(?=.*\d{2,}).{8,15}$/;//http://regexr.com?2vndp
            
            var passwordValue = field.get("value");
            
            if(rePassword.test(passwordValue)){
                return true;
            }else{
                return false;
            }
        },
        /**
        * Usernumber value check: must be 36 digits and have no non-numeral characters
        * @param field {NodeObject} the field object
        * @return {boolean} the result of validation
        */
        usernumber: function(field){
            var reUsernumber = /^[0-9]{36}(?!\D)$/;//http://regexr.com?2vndm
            
            var usernumberValue = field.get('value');
            
            if(reUsernumber.test(usernumberValue)){
                return true;
            }else{
                return false;
            }
        }
    };
    /**
    * checkField: checks a input field agaisnt a validator function.
    * @param fieldID {string} the id of the field to be checked. "#id"
    * @param validateFunction {string} the validate function to check the field with. "validate.username"
    */
    var checkField = function(fieldID, validateFunction){
        Y.one(fieldID).on('keyup', function(e){
            if(validateFunction(this)){
                this.addClass('success');
                this.removeClass('error');
            }else{
                this.removeClass('success');
                this.addClass('error');
            }
        });
    };
    var loginFormValidation = function(){
        checkField('#username', validate.username);
        checkField('#password', validate.password);
        checkField('#usernumber', validate.usernumber);      
        
        Y.one("#loginform").on("submit", function(e){
            e.preventDefault();
            var errorMessage = Y.one('#loginformerror');
            if(validate.username(Y.one('#username')) && validate.password(Y.one('#password')) && validate.usernumber(Y.one('#usernumber'))){
                errorMessage.setContent('<p></p>');
                document.loginform.submit();
            }else{
                errorMessage.setContent('<p>There was an error in the form.  Please try again.</p>');
            }
        });
        
        return false;
    };