valid.js

ajax基础操作实例,无刷添加删除等..

function Validator(formName, elemName, outId, msg) {
    if (formName)
        this.formName = formName;
    if (elemName)
        this.elemName = elemName;
    if (outId)
        this.outId = outId;
    if (msg)
        this.msgList = ["", msg];
}

Validator.prototype.defaultMsgIndex = 0;

Validator.prototype.getFormValues = function() {
    var elemValues = new Array();
    var form = document.forms[this.formName];
    var formElements = form.elements;
    for (var i = 0; i < formElements.length; i++) {
        var element = formElements[i];
        if (element.name == this.elemName) {
            var elemType = element.type.toLowerCase();
            if (elemType == "text" || elemType == "textarea"
                    || elemType == "password" || elemType == "hidden")
                elemValues[elemValues.length] = element.value;
            else if (elemType == "checkbox" && element.checked)
                elemValues[elemValues.length]
                     = element.value ? element.value : "On";
            else if (elemType == "radio" && element.checked)
                elemValues[elemValues.length] = element.value;
            else if (elemType.indexOf("select") != -1)
                for (var j = 0; j < element.options.length; j++) {
                    var option = element.options[j];
                    if (option.selected) {
                        elemValues[elemValues.length]
                            = option.value ? option.value : option.text;
                    }
                }
        }
    }
    return elemValues;
}

Validator.prototype.verify = function(value) {
    return 0;
}

Validator.prototype.showMsg = function(index) {
    document.getElementById(this.outId).innerHTML
        = htmlEncode(this.msgList[index]);
}

Validator.prototype.execute = function() {
    var msgIndex = this.defaultMsgIndex;
    var elemValues = this.getFormValues();
    for (var i = 0; i < elemValues.length; i++)
        if (elemValues[i]) {
            msgIndex = this.verify(elemValues[i]);
            if (msgIndex != 0)
                break;
        }
    this.showMsg(msgIndex);
    return msgIndex == 0;
}


function RequiredValidator(formName, elemName, outId, msg) {
    this.base = Validator;
    this.base(formName, elemName, outId, msg);
    delete this.base;
}

RequiredValidator.prototype = new Validator();

RequiredValidator.prototype.defaultMsgIndex = 1;

RequiredValidator.prototype.verify = function(value) {
    return value.length > 0 ? 0 : 1;
}


function LengthValidator(formName, elemName, outId, min, max, msgMin, msgMax) {
    this.base = Validator;
    this.base(formName, elemName, outId);
    delete this.base;
    this.min = min;
    this.max = max;
    this.msgList = ["", msgMin, msgMax];
}

LengthValidator.prototype = new Validator();

LengthValidator.prototype.verify = function(value) {
    if (value.length < this.min)
        return 1;
    if (value.length > this.max && this.max > 0)
        return 2;
    return 0;
}


function ValidatorList() {
    this.validatorArray = new Array();
}

ValidatorList.prototype.add = function(validator) {
    this.validatorArray[this.validatorArray.length] = validator;
}

ValidatorList.prototype.execute = function(formName, elemName) {
    var valid = true;
    for (var i = 0; i < this.validatorArray.length; i++) {
        var validator = this.validatorArray[i];
        if (validator.formName == formName)
            if (!elemName || validator.elemName == elemName)
                if (!validator.execute())
                    valid = false;
    }
    return valid;
}

var pageValidators = new ValidatorList();