function isIdCardNo(num) {???????????
??? num = num.toUpperCase();?????????? //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X。???????
??? if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(num))) {????
??????? alert('输入的身份证号长度不对，或者号码不符合规定！\n15位号码应全为数字，18位号码末位可以为数字或X。');?????????????
??????? return false;????????
??? } //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
??? //下面分别分析出生日期和校验位
??? var len, re; len = num.length; if (len == 15) {
??????? re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
??????? var arrSplit = num.match(re);? //检查生日日期是否正确
??????? var dtmBirth = new Date('19' + arrSplit[2] + '/' + arrSplit[3] + '/' + arrSplit[4]);
??????? var bGoodDay; bGoodDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
??????? if (!bGoodDay) {????????
??????????? alert('输入的身份证号里出生日期不对！');???????????
??????????? return false;
??????? } else { //将15位身份证转成18位 //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。???????
??????????? var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);????????
??????????? var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');?????
??????????? var nTemp = 0, i;???????????
??????????? num = num.substr(0, 6) + '19' + num.substr(6, num.length - 6);??????????
??????????? for(i = 0; i < 17; i ++) {????????????????
??????????????? nTemp += num.substr(i, 1) * arrInt[i];???????
??????????? }
??????????? num += arrCh[nTemp % 11];
??????????? return true;
??????? }
??? }
??? if (len == 18) {
??????? re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
??????? var arrSplit = num.match(re);? //检查生日日期是否正确
??????? var dtmBirth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]);
??????? var bGoodDay; bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
??????? if (!bGoodDay) {
??????????? alert(dtmBirth.getYear());
??????????? alert(arrSplit[2]);
??????????? alert('输入的身份证号里出生日期不对！');
??????????? return false;
??????? }
??????? else { //检验18位身份证的校验码是否正确。 //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
??????????? var valnum;
??????????? var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
??????????? var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
??????????? var nTemp = 0, i;
??????????? for(i = 0; i < 17; i ++) {
??????????????? nTemp += num.substr(i, 1) * arrInt[i];
??????????? }
??????????? valnum = arrCh[nTemp % 11];
??????????? if (valnum != num.substr(17, 1)) {
??????????????? alert('18位身份证的校验码不正确！应该为：' + valnum);
??????????????? return false;
??????????? }
??????????? return true;
??????? }
??? } return false;

}

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