身份证校验

身份证校验

 
        function isChinaIDCard(StrNo) {
            StrNo = StrNo.toString()
            if (StrNo.length == 18) {
                var a, b, c
                if (!isInteger(StrNo.substr(0, 17))) { return false }
                a = parseInt(StrNo.substr(0, 1)) * 7 + parseInt(StrNo.substr(1, 1)) * 9 + parseInt(StrNo.substr(2, 1)) * 10;
                a = a + parseInt(StrNo.substr(3, 1)) * 5 + parseInt(StrNo.substr(4, 1)) * 8 + parseInt(StrNo.substr(5, 1)) * 4;
                a = a + parseInt(StrNo.substr(6, 1)) * 2 + parseInt(StrNo.substr(7, 1)) * 1 + parseInt(StrNo.substr(8, 1)) * 6;
                a = a + parseInt(StrNo.substr(9, 1)) * 3 + parseInt(StrNo.substr(10, 1)) * 7 + parseInt(StrNo.substr(11, 1)) * 9;
                a = a + parseInt(StrNo.substr(12, 1)) * 10 + parseInt(StrNo.substr(13, 1)) * 5 + parseInt(StrNo.substr(14, 1)) * 8;
                a = a + parseInt(StrNo.substr(15, 1)) * 4 + parseInt(StrNo.substr(16, 1)) * 2;
                b = a % 11;

                if (b == 2)   //最后一位为校验位  
                {
                    c = StrNo.substr(17, 1).toUpperCase();   //转为大写X  
                }
                else {
                    c = parseInt(StrNo.substr(17, 1));
                }

                switch (b) {
                    case 0: if (c != 1) { alert("身份证好号码校验位错:最后一位应该为:1"); return false; } break;
                    case 1: if (c != 0) { alert("身份证好号码校验位错:最后一位应该为:0"); return false; } break;
                    case 2: if (c != "X") { alert("身份证好号码校验位错:最后一位应该为:X"); return false; } break;
                    case 3: if (c != 9) { alert("身份证好号码校验位错:最后一位应该为:9"); return false; } break;
                    case 4: if (c != 8) { alert("身份证好号码校验位错:最后一位应该为:8"); return false; } break;
                    case 5: if (c != 7) { alert("身份证好号码校验位错:最后一位应该为:7"); return false; } break;
                    case 6: if (c != 6) { alert("身份证好号码校验位错:最后一位应该为:6"); return false; } break;
                    case 7: if (c != 5) { alert("身份证好号码校验位错:最后一位应该为:5"); return false; } break;
                    case 8: if (c != 4) { alert("身份证好号码校验位错:最后一位应该为:4"); return false; } break;
                    case 9: if (c != 3) { alert("身份证好号码校验位错:最后一位应该为:3"); return false; } break;
                    case 10: if (c != 2) { alert("身份证好号码校验位错:最后一位应该为:2"); return false }
                }
            }
            else if (StrNo.length == 15)   //15位身份证号  
            {
                if (!isInteger(StrNo)) { alert("身份证号码错误,前15位不能含有英文字母！"); return false }
            }
            else {
                alert("输入的身份证号码必须为15位或者18位！");
                return false
             }
            switch (StrNo.length-1) {
                case 15:
                    if (isValidDate("19" + StrNo.substr(6, 2), StrNo.substr(8, 2), StrNo.substr(10, 2)))
                    { return true; }
                    else
                    { return false; }
                case 18:
                    if (isValidDate(StrNo.substr(6, 4), StrNo.substr(10, 2), StrNo.substr(12, 2)))
                    { return true; }
                    else
                    { return false; }
            }
        }

        function isValidDate(iY, iM, iD) {
            var a = new Date(iY, iM, iD);
            var y = a.getFullYear();
            var m = a.getMonth();
            var d = a.getDate();
            if (y != iY || m != iM || d != iD) {
                window.alert('身份证号码内日期错误！');
                return false;
            }
            return true
        }

        function isInteger(str) {
            if (/[^\d]+$/.test(str)) {
                return false;
            }
            return true;
        }


        function IDUpdate(StrNo) {

            if (!isChinaIDCard(StrNo)) { return false }
            if (StrNo.length == 15) {
                var a, b, c
                StrNo = StrNo.substr(0, 6) + "19" + StrNo.substr(6, 9)
                a = parseInt(StrNo.substr(0, 1)) * 7 + parseInt(StrNo.substr(1, 1)) * 9 + parseInt(StrNo.substr(2, 1)) * 10;
                a = a + parseInt(StrNo.substr(3, 1)) * 5 + parseInt(StrNo.substr(4, 1)) * 8 + parseInt(StrNo.substr(5, 1)) * 4;
                a = a + parseInt(StrNo.substr(6, 1)) * 2 + parseInt(StrNo.substr(7, 1)) * 1 + parseInt(StrNo.substr(8, 1)) * 6;
                a = a + parseInt(StrNo.substr(9, 1)) * 3 + parseInt(StrNo.substr(10, 1)) * 7 + parseInt(StrNo.substr(11, 1)) * 9;
                a = a + parseInt(StrNo.substr(12, 1)) * 10 + parseInt(StrNo.substr(13, 1)) * 5 + parseInt(StrNo.substr(14, 1)) * 8;
                a = a + parseInt(StrNo.substr(15, 1)) * 4 + parseInt(StrNo.substr(16, 1)) * 2;
                b = a % 11;

                switch (b) {
                    case 0: { StrNo = StrNo + "1"; } break;
                    case 1: { StrNo = StrNo + "0"; } break;
                    case 2: { StrNo = StrNo + "X"; } break;
                    case 3: { StrNo = StrNo + "9"; } break;
                    case 4: { StrNo = StrNo + "8"; } break;
                    case 5: { StrNo = StrNo + "7"; } break;
                    case 6: { StrNo = StrNo + "6"; } break;
                    case 7: { StrNo = StrNo + "5"; } break;
                    case 8: { StrNo = StrNo + "4"; } break;
                    case 9: { StrNo = StrNo + "3"; } break;
                    case 10: { StrNo = StrNo + "3"; }
                }
            }
            return StrNo;
        }