jQuery validate

jquery.validate.js

(function ($) {
    var spes = { checkbox: 1, radio: 1 };

    $.fn.validate = function (def, fns) {
        if (!this.is('form')) return this;
        var form = this.get(0);
        if (!arguments.length && $.isFunction(form.__VALIDFUNC)) {
            return form.__VALIDFUNC.call(form);
        }
        if (!$.isPlainObject(def)) return this;

        def = def || {}; fns = fns || {};
        
        fns.onerror = $.isFunction(fns.onerror) ? fns.onerror : $.validate.onerror;

        form.__VALIDFUNC = function (e) {
            for (var nm in def) {
                var input = form.elements[nm], valids = def[nm];
                if (!input || !$.isPlainObject(valids)) { continue; }

                for (var con in valids) {
                    var chk = $.validate.fn[con], args = valids[con];
                    if (!$.isFunction(chk)) { continue; }
                    if ($.isArray(args)) {
                        var msg = args.pop();
                        if (input.length) {
                            var valid = false;
                            for (var i = 0, len = input.length; i < len; i++) {
                                if (spes[input[i].type] && chk.apply(input[i], args)) {
                                    valid = true; break;
                                } else if (!chk.apply(input[i], args)) {
                                    valid = false; break;
                                }
                            }
                            if (!valid) {
                                fns.onerror.call(input, msg || $.validate.msg);
                                return false;
                            }
                        }else if (!chk.apply(input, args)) {
                            fns.onerror.call(input, msg || $.validate.msg);
                            return false;
                        }
                    } else {
                        var msg = args;
                        if (input.length) {
                            var valid = false;
                            for (var i = 0, len = input.length; i < len; i++) {
                                if (spes[input[i].type] && chk.call(input)) {
                                    valid = true; break;
                                } else if (!chk.call(input)) {
                                    valid = false; break;
                                }
                            }
                            if (!valid) {
                                fns.onerror.call(input, msg || $.validate.msg);
                                return false;
                            }
                        } else if (!chk.call(input)) {
                            fns.onerror.call(input, msg || $.validate.msg);
                            return false;
                        }
                    }
                }
            }
            return true;
        };

        form.onsubmit = function (e) {
            e = e || window.event;
            if ($.isFunction(fns.onbefore)) { fns.onbefore.call(form,e); }
            var result = form.__VALIDFUNC.call(form, e);
            if (!result) {
                if (e.preventDefault) e.preventDefault();
                else e.cancelable = false;
            }
            if ($.isFunction(fns.onafter)) { fns.onafter.call(form, e); }

            return result;
        };

        return this;
    };
    $.validate = {
        fn: {
            required: function () {
                return $.trim(this.value) != '' || input.checked;
            },
            minlength: function (len) {
                return this.value.length >= len;
            },
            maxlength: function (len) {
                return this.value.length <= len;
            },
            alpha: function () {
                return /^[a-z\s]*$/i.test(this.value);
            },
            numeric: function () {
                return this.value.length == 0 || !isNaN(+this.value);
            },
            alphanumeric: function () {
                return /^[\S\s]*$/.test(this.value);
            },
            latin: function () {
                return /^\w*$/.test(this.value);
            },
            password: function () {
                return this.value ? /[a-zA-Z]/.test(this.value)&&/[0-9]/.test(this.value) : true;
            },
            strongPassword: function () {
                return this.value ? /[a-z]/.test(this.value) && /[A-Z]/.test(this.value) && /[0-9]/.test(this.value) && /[!@#$%^&*-=+~]/.test(this.value) : true;
            },
            notspecial:function(){
                return !/[~`$%\^&*-+:;'"\/?]/.test(this.value);
            },
            email:function(){
                return /^[\w-\._\+%]+@(?:[\w-]+\.)+[\w]{2,6}$/.test(this.value);
            },
            url:function(){
                return /[-a-zA-Z0-9@:%_\+.~#?&\/\/=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&\/\/=]*)?/.test(this.value);
            },
            phone:function(){
                return /(02|01[0126789]|0[3-6][1-4]|070)-[0-9]{3,4}-[0-9]{4}/.test(this.value);
            },
            tel:function(){
                return /^(\(?(\d{3})\)?\s?-?\s?(\d{3})\s?-?\s?(\d{4}))$/.test(this.value);
            },
            equal: function (val) {
                return this.value == val;
            },
            contains: function (val) {
                return ~this.value.indexOf(val)>0;
            },
            first: function (val) {
                return this.value.indexOf(val) == 0;
            },
            last: function (val) {
                return this.value.indexOf(val) == this.value.length - val.length;
            },
            pattern: function (regex) {
                return (regex instanceof RegExp) ? regex.test(this.value) : new RegExp(regex).test(this.value);
            },
            custom: function (fn) {
                return $.isFunction(fn) ? !!fn.call(this) : true;
            }
        }, msg: 'This fields are not valid.'
        ,onerror:function(msg){
            alert(msg);
            this.focus();
        }
    };
})(jQuery);