自定义验证控件和JavaScript实现的身份证号验证

 function checkIdcard2(objSource,objArgs){
        
        var idcard=objArgs.Value;
        var area={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"***",71:"台湾",81:"香港",82:"澳门",91:"国外"} ;

        var idcard,Y,JYM;
        var S,M;
        var idcard_array = new Array();
        idcard_array = idcard.split("");
        //地区检验
        if(area[parseInt(idcard.substr(0,2))]==null) 
        {
        document.getElementById(objSource.id).setAttribute(
                    "errormessage", "身份证地区非法!");
        objArgs.IsValid=false ;
        return; 
        }
        //身份号码位数及格式检验
        switch(idcard.length){
        case 15:
                if ( (parseInt(idcard.substr(6,2))+1900) % 4 == 0 || ((parseInt(idcard.substr(6,2))+1900) % 100 == 0 && (parseInt(idcard.substr(6,2))+1900) % 4 == 0 )){
                ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$/;//测试出生日期的合法性
                }
                else {
                ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/;//测试出生日期的合法性
                }
                if(ereg.test(idcard)){ objArgs.IsValid=true; return};
                else
                {
                document.getElementById(objSource.id).setAttribute(
                    "errormessage", "身份证号码出生日期超出范围或含有非法字符!");
                objArgs.IsValid=false;
                return; 
                } 
                break;
        case 18:
            //18位身份号码检测
            //出生日期的合法性检查 
            //闰年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))
            //平年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))
            if ( parseInt(idcard.substr(6,4)) % 4 == 0 || (parseInt(idcard.substr(6,4)) % 100 == 0 && parseInt(idcard.substr(6,4))%4 == 0 )){
            ereg=/^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$/;//闰年出生日期的合法性正则表达式
            } else {
            ereg=/^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/;//平年出生日期的合法性正则表达式
            }
            if(ereg.test(idcard)){//测试出生日期的合法性
            //计算校验位
            S = (parseInt(idcard_array[0]) + parseInt(idcard_array[10])) * 7
            + (parseInt(idcard_array[1]) + parseInt(idcard_array[11])) * 9
            + (parseInt(idcard_array[2]) + parseInt(idcard_array[12])) * 10
            + (parseInt(idcard_array[3]) + parseInt(idcard_array[13])) * 5
            + (parseInt(idcard_array[4]) + parseInt(idcard_array[14])) * 8
            + (parseInt(idcard_array[5]) + parseInt(idcard_array[15])) * 4
            + (parseInt(idcard_array[6]) + parseInt(idcard_array[16])) * 2
            + parseInt(idcard_array[7]) * 1 
            + parseInt(idcard_array[8]) * 6
            + parseInt(idcard_array[9]) * 3 ;
            Y = S % 11;
            M = "F";
            JYM = "10X98765432";
            M = JYM.substr(Y,1);//判断校验位
            if(M == idcard_array[17])//检测ID的校验位
            {objArgs.IsValid=true; return ; }
            else
            { 
            document.getElementById(objSource.id).setAttribute(
                    "errormessage", "身份证号码校验错误!");
            objArgs.IsValid= false; return;
            }
            }
            else 
            {
            document.getElementById(objSource.id).setAttribute(
                    "errormessage", "身份证号码出生日期超出范围或含有非法字符!");
            objArgs.IsValid= false; return;
            }
            break;
        default:
            document.getElementById(objSource.id).setAttribute(
                    "errormessage", "身份证号码位数不对!");
            objArgs.IsValid= false; return;
            break;
        }
        
}



<asp:customvalidator id="Customvalidator4" runat="server" Display="Dynamic" ErrorMessage='"身份证号" 无效！'
                            ControlToValidate="TextBox7" ClientValidationFunction="checkIdcard2">！</asp:customvalidator>