The following is based on the ID number coding rules, using JS to validate the code
/**
* ID Card 15-bit coding rule: dddddd YYMMDD xx p
* DDDDDD: Area code
* YYMMDD: Date of birth
* XX: Sequential class code, cannot be determined
* p: Sex, odd for male, even for female
* <p/>
* ID card 18-bit coding rule: dddddd yyyymmdd xxx y
* DDDDDD: Area code
* YYYYMMDD: Date of birth
* XXX: Sequence class Code, cannot be determined, odd number is male, even number is female
* Y: Check code, which can be obtained by the first 17 digits
* <p/>
* 18-bit number weighting factor (from right to left) Wi = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2,1]
* Verify Bit Y = [1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2]
* Check digit calculation formula: y_p = mod (∑ (AIXWI), 11)
* I for the ID card number from the right to the left of the 2...18 bit; Y_p for the Foot check code is the location of the check Code array
*
*/
var Wi = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1];//weighting factor
var validecode = [1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2];//ID card Verification bit value. 10 represents X
function Idcardvalidate (idcard) {
Idcard = Trim (idcard.replace (//g, ""));
if (idcard.length = = 15) {
Return Isvaliditybrithby15idcard (Idcard);
else if (idcard.length = 18) {
var a_idcard = Idcard.split ("");//Get ID card array
if (Isvaliditybrithby18idcard (Idcard) &&istruevalidatecodeby18idcard (A_idcard)) {
return true;
}else {
return false;
}
} else {
return false;
}
}
/**
* Determine whether the final verification bit is correct when the ID number is 18 digits
* @param a_idcard ID number array
* @return
*/
function Istruevalidatecodeby18idcard (a_idcard) {
var sum = 0; Declaring a weighted sum variable
if (a_idcard[17].tolowercase () = = ' X ') {
A_IDCARD[17] = 10;//replaces the last bit X's captcha with 10 for subsequent operations
}
for (var i = 0; i < i++) {
Sum + = wi[i] * a_idcard[i];//weighted sum
}
valcodeposition = sum% 11;//Get the location of the verification code
if (a_idcard[17] = = Validecode[valcodeposition]) {
return true;
} else {
return false;
}
}
/**
* Judging by ID card is male or female
* @param idcard 15/18-digit ID number
* @return ' female '-female, ' male '-male
*/
function Maleorfemalbyidcard (idcard) {
Idcard = Trim (idcard.replace (//g, ""))//To handle the ID number. Includes spaces between characters.
if (idcard.length==15) {
if (idcard.substring (14,15)%2==0) {
return ' female ';
}else{
return ' male ';
}
}else if (idcard.length ==18) {
if (idcard.substring (14,17)%2==0) {
return ' female ';
}else{
return ' male ';
}
}else{
return null;
}
Can be processed directly as an array for incoming characters
if (idcard.length==15) {
Alert (idcard[13]);
if (idcard[13]%2==0) {
return ' female ';
}else{
return ' male ';
// }
}else if (idcard.length==18) {
Alert (idcard[16]);
if (idcard[16]%2==0) {
return ' female ';
}else{
return ' male ';
// }
}else{
return null;
// }
}
/**
* Verify that the birthdays in the 18-digit ID number are valid birthdays
* @param idcard 18-digit ID card string
* @return
*/
function Isvaliditybrithby18idcard (IDCARD18) {
var year = idcard18.substring (6,10);
var month = idcard18.substring (10,12);
var day = idcard18.substring (12,14);
var temp_date = new Date (year,parsefloat (month) -1,parsefloat (day));
We use getFullYear () to get the year to avoid the millennium bug problem.
if (Temp_date.getfullyear ()!=parsefloat (year)
|| Temp_date.getmonth ()!=parsefloat (month)-1
|| Temp_date.getdate ()!=parsefloat (day)) {
return false;
}else{
return true;
}
}
/**
* Verify that the birthdays in the 15-digit ID number are valid birthdays
* @param idCard15 15-digit ID card string
* @return
*/
function Isvaliditybrithby15idcard (IDCARD15) {
var year = idcard15.substring (6,8);
var month = idcard15.substring (8,10);
var day = idcard15.substring (10,12);
var temp_date = new Date (year,parsefloat (month) -1,parsefloat (day));
The GetYear () method is used for your age in the old ID card without considering the millennium bug problem.
if (Temp_date.getyear ()!=parsefloat (year)
|| Temp_date.getmonth ()!=parsefloat (month)-1
|| Temp_date.getdate ()!=parsefloat (day)) {
return false;
}else{
return true;
}
}
Remove string and tail space
function Trim (str) {
Return Str.replace (/(^\s*) | ( \s*$)/g, "");
}
