表單的驗證一直是網頁設計者頭痛的問題，表單驗證類 Validator就是為解決這個問題而寫的，旨在使設計者從紛繁複雜的表單驗證中解放出來，把精力集中於網頁的設計和功能上的改進上。
Validator是基於JavaScript技術的偽靜態類和物件的自定義屬性，可以對網頁中的表單項輸入進行相應的驗證，允許同一頁面中同時驗證多個表單，熟悉介面之後也可以對特定的表單項甚至僅僅是某個字串進行驗證。因為是偽靜態類，所以在呼叫時不需要例項化，直接以"類名+.語法+屬性或方法名"來呼叫。此外，Validator還提供3種不同的錯誤提示模式，以滿足不同的需要。
Validator目前可實現的驗證型別有：
1.是否為空；
2.中文字元；
3.雙位元組字元
4.英文；
5.數字；
6.整數；
7.實數；
8.Email地址；
9.使用HTTP協議的網址；
10.電話號碼；
11.貨幣；
12.手機號碼；
13.郵政編碼；
14.身份證號碼；
15.QQ號碼；
16.日期；
17.符合安全規則的密碼；
18.某項的重複值；
19.兩數的關係比較；
20.判斷輸入值是否在(n, m)區間；
21.輸入字元長度限制(可按位元組比較)；
22.對於具有相同名稱的單選按鈕的選中判斷；
23.限制具有相同名稱的多選按鈕的選中數目；
24.自定義的正則表示式驗證；
執行環境(客戶端)：
在Windows Server 2003下用IE6.0+SP1和Mozilla Firefox 1.0測試通過；
在Lunix RedHat 9下的Netscape測試通過；

<title>表單驗證類 Validator v1.01</title>
<style>
body,td{font:normal 12px Verdana;color:#333333}
input,textarea,select,td{font:normal 12px Verdana;color:#333333;border:1px solid #999999;background:#ffffff}
table{border-collapse:collapse;}
td{padding:3px}
input{height:20;}
textarea{width:80%;height:50px;overfmin:auto;}
form{display:inline}
</style>
<table align="center">
  <form name="theForm" id="demo" action="" method="get" onSubmit="return Validator.Validate(this,2)">
    <tr>
   <td>真實姓名：</td><td><input name="Name" dataType="Chinese" msg="真實姓名只允許中文"></td>
  </tr>
  <tr>
   <td>英文名：</td><td><input name="Nick" dataType="English" require="false" msg="英文名只允許英文字母"></td>
  </tr>
    <tr>
   <td>主頁：</td><td><input name="Homepage" require="false" dataType="Url"   msg="非法的Url"></td>
  </tr>
  <tr>
   <td>密碼：</td><td><input name="Password" dataType="SafeString"   msg="密碼不符合安全規則" type="password"></td>
  </tr>
  <tr>
   <td>重複：</td><td><input name="Repeat" dataType="Repeat" to="Password" msg="兩次輸入的密碼不一致" type="password"></td>
  </tr>
  <tr>
   <td>信箱：</td><td><input name="Email" dataType="Email" msg="信箱格式不正確"></td>
  </tr>
    <tr>
   <td>信箱：</td><td><input name="Email" dataType="Repeat" to="Email" msg="兩次輸入的信箱不一致"></td>
  </tr>
  <tr>
   <td>QQ：</td><td><input name="QQ" require="false" dataType="QQ" msg="QQ號碼不存在"></td>
  </tr>
    <tr>
   <td>身份證：</td><td><input name="Card" dataType="IdCard" msg="身份證號碼不正確"></td>
  </tr>
  <tr>
   <td>年齡：</td><td><input name="Year" dataType="Range" msg="年齡必須在18~28之間" min="18" max="28"></td>
  </tr>
   <tr>
   <td>年齡1：</td><td><input name="Year1" require="false" dataType="Compare" msg="年齡必須在18以上" to="18" operator="GreaterThanEqual"></td>
  </tr>
   <tr>
   <td>電話：</td><td><input name="Phone" require="false" dataType="Phone" msg="電話號碼不正確"></td>
  </tr>
   <tr>
   <td>手機：</td><td><input name="Mobile" require="false" dataType="Mobile" msg="手機號碼不正確"></td>
  </tr>
     <tr>
   <td>生日：</td><td><input name="Birthday" dataType="Date" format="ymd" msg="生日日期不存在"></td>
  </tr>
   <tr>
   <td>郵政編碼：</td><td><input name="Zip" dataType="Custom" regexp="^[1-9]/d{5}$" msg="郵政編碼不存在"></td>
  </tr>
  <tr>
   <td>郵政編碼：</td><td><input name="Zip1" dataType="Zip" msg="郵政編碼不存在"></td>
  </tr>
  <tr>
   <td>作業系統：</td><td><select name="Operation" dataType="Require"  msg="未選擇所用作業系統" ><option value="">選擇您所用的作業系統</option><option value="Win98">Win98</option><option value="Win2k">Win2k</option><option value="WinXP">WinXP</option></select></td>
  </tr>
  <tr>
   <td>所在省份：</td><td>廣東<input name="Province" value="1" type="radio">陝西<input name="Province" value="2" type="radio">浙江<input name="Province" value="3" type="radio">江西<input name="Province" value="4" type="radio" dataType="Group"  msg="必須選定一個省份" ></td>
  </tr>
  <tr>
   <td>愛好：</td><td>運動<input name="Favorite" value="1" type="checkbox">上網<input name="Favorite" value="2" type="checkbox">聽音樂<input name="Favorite" value="3" type="checkbox">看書<input name="Favorite" value="4" type="checkbox"" dataType="Group" min="2" max="3"  msg="必須選擇2~3種愛好"></td>
  </tr>
   <td>自我介紹：</td><td><textarea name="Description" dataType="Limit" max="10"  msg="自我介紹內容必須在10個字之內">中文是一個字</textarea></td>
  </tr>
     <td>自傳：</td><td><textarea name="History" dataType="LimitB" min="3" max="10"  msg="自傳內容必須在[3,10]個位元組之內">中文是兩個位元組t</textarea></td>
  </tr>
  <tr>
   <td colspan="2"><input name="Submit" type="submit" value="確定提交"><input onClick="Validator.Validate(document.getElementById('demo'))" value="檢驗模式1" type="button"><input onClick="Validator.Validate(document.getElementById('demo'),2)" value="檢驗模式2" type="button"><input onClick="Validator.Validate(document.getElementById('demo'),3)" value="檢驗模式3" type="button"></td>
  </tr>
  </form>
</table>
<script>
/*************************************************
        Validator v1.01
        code by 我佛山人
       

[email protected]
        http://www.cunite.com
*************************************************/
Validator = {
        Require : /.+/,
        Email : /^/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*$/,
        Phone : /^((/(/d{3}/))|(/d{3}/-))?(/(0/d{2,3}/)|0/d{2,3}-)?[1-9]/d{6,7}$/,
        Mobile : /^((/(/d{3}/))|(/d{3}/-))?13/d{9}$/,
        Url : /^http:////[A-Za-z0-9]+/.[A-Za-z0-9]+[//=/?%/-&_~`@[/]/':+!]*([^<>/"/"])*$/,
        IdCard : /^/d{15}(/d{2}[A-Za-z0-9])?$/,
        Currency : /^/d+(/./d+)?$/,
        Number : /^/d+$/,
        Zip : /^[1-9]/d{5}$/,
        QQ : /^[1-9]/d{4,8}$/,
        Integer : /^[-/+]?/d+$/,
        Double : /^[-/+]?/d+(/./d+)?$/,
        English : /^[A-Za-z]+$/,
        Chinese :  /^[/u0391-/uFFE5]+$/,
        UnSafe : /^(([A-Z]*|[a-z]*|/d*|[-_/

[email protected]#/$%/^&/*/./(/)/[/]/{/}<>/?/////'/"]*)|.{0,5})$|/s/,
        IsSafe : function(str){return !this.UnSafe.test(str);},
        SafeString : "this.IsSafe(value)",
        Limit : "this.limit(value.length,getAttribute('min'),  getAttribute('max'))",
        LimitB : "this.limit(this.LenB(value), getAttribute('min'), getAttribute('max'))",
        Date : "this.IsDate(value, getAttribute('min'), getAttribute('format'))",
        Repeat : "value == document.getElementsByName(getAttribute('to'))[0].value",
        Range : "getAttribute('min') < value && value < getAttribute('max')",
        Compare : "this.compare(value,getAttribute('operator'),getAttribute('to'))",
        Custom : "this.Exec(value, getAttribute('regexp'))",
        Group : "this.MustChecked(getAttribute('name'), getAttribute('min'), getAttribute('max'))",
        ErrorItem : [document.forms[0]],
        ErrorMessage : ["以下原因導致提交失敗：/t/t/t/t"],
        Validate : function(theForm, mode){
                var obj = theForm || event.srcElement;
                var count = obj.elements.length;
                this.ErrorMessage.length = 1;
                this.ErrorItem.length = 1;
                this.ErrorItem[0] = obj;
                for(var i=0;i<count;i++){
                        with(obj.elements[i]){
                                var _dataType = getAttribute("dataType");
                                if(typeof(_dataType) == "object" || typeof(this[_dataType]) == "undefined")  continue;
                                this.ClearState(obj.elements[i]);
                                if(getAttribute("require") == "false" && value == "") continue;
                                switch(_dataType){
                                        case "Date" :
                                        case "Repeat" :
                                        case "Range" :
                                        case "Compare" :
                                        case "Custom" :
                                        case "Group" :
                                        case "Limit" :
                                        case "LimitB" :
                                        case "SafeString" :
                                                if(!eval(this[_dataType]))        {
                                                        this.AddError(i, getAttribute("msg"));
                                                }
                                                break;
                                        default :
                                                if(!this[_dataType].test(value)){
                                                        this.AddError(i, getAttribute("msg"));
                                                }
                                                break;
                                }
                        }
                }
                if(this.ErrorMessage.length > 1){
                        mode = mode || 1;
                        var errCount = this.ErrorItem.length;
                        switch(mode){
                        case 2 :
                                for(var i=1;i<errCount;i++)
                                        this.ErrorItem[i].style.color = "red";
                        case 1 :
                                alert(this.ErrorMessage.join("/n"));
                                this.ErrorItem[1].focus();
                                break;
                        case 3 :
                                for(var i=1;i<errCount;i++){
                                try{
                                        var span = document.createElement("SPAN");
                                        span.id = "__ErrorMessagePanel";
                                        span.style.color = "red";
                                        this.ErrorItem[i].parentNode.appendChild(span);
                                        span.innerHTML = this.ErrorMessage[i].replace(//d+:/,"*");
                                        }
                                        catch(e){alert(e.description);}
                                }
                                this.ErrorItem[1].focus();
                                break;
                        default :
                                alert(this.ErrorMessage.join("/n"));
                                break;
                        }
                        return false;
                }
                return true;
        },
        limit : function(len,min, max){
                min = min || 0;
                max = max || Number.MAX_VALUE;
                return min <= len && len <= max;
        },
        LenB : function(str){
                return str.replace(/[^/x00-/xff]/g,"**").length;
        },
        ClearState : function(elem){
                with(elem){
                        if(style.color == "red")
                                style.color = "";
                        var lastNode = parentNode.childNodes[parentNode.childNodes.length-1];
                        if(lastNode.id == "__ErrorMessagePanel")
                                parentNode.removeChild(lastNode);
                }
        },
        AddError : function(index, str){
                this.ErrorItem[this.ErrorItem.length] = this.ErrorItem[0].elements[index];
                this.ErrorMessage[this.ErrorMessage.length] = this.ErrorMessage.length + ":" + str;
        },
        Exec : function(op, reg){
                return new RegExp(reg,"g").test(op);
        },
        compare : function(op1,operator,op2){
                switch (operator) {
                        case "NotEqual":
                                return (op1 != op2);
                        case "GreaterThan":
                                return (op1 > op2);
                        case "GreaterThanEqual":
                                return (op1 >= op2);
                        case "LessThan":
                                return (op1 < op2);
                        case "LessThanEqual":
                                return (op1 <= op2);
                        default:
                                return (op1 == op2);            
                }
        },
        MustChecked : function(name, min, max){
                var groups = document.getElementsByName(name);
                var hasChecked = 0;
                min = min || 1;
                max = max || groups.length;
                for(var i=groups.length-1;i>=0;i--)
                        if(groups[i].checked) hasChecked++;
                return min <= hasChecked && hasChecked <= max;
        },
        IsDate : function(op, formatString){
                formatString = formatString || "ymd";
                var m, year, month, day;
                switch(formatString){
                        case "ymd" :
                                m = op.match(new RegExp("^((//d{4})|(//d{2}))([-./])(//d{1,2})//4(//d{1,2})$"));
                                if(m == null ) return false;
                                day = m[6];
                                month = m[5]--;
                                year =  (m[2].length == 4) ? m[2] : GetFullYear(parseInt(m[3], 10));
                                break;
                        case "dmy" :
                                m = op.match(new RegExp("^(//d{1,2})([-./])(//d{1,2})//2((//d{4})|(//d{2}))$"));
                                if(m == null ) return false;
                                day = m[1];
                                month = m[3]--;
                                year = (m[5].length == 4) ? m[5] : GetFullYear(parseInt(m[6], 10));
                                break;
                        default :
                                break;
                }
                if(!parseInt(month)) return false;
                month = month==12 ?0:month;
                var date = new Date(year, month, day);
        return (typeof(date) == "object" && year == date.getFullYear() && month == date.getMonth() && day == date.getDate());
                function GetFullYear(y){return ((y<30 ? "20" : "19") + y)|0;}
        }
}
</script>