Ultra-accurate JavaScript verification of the specific implementation of the ID number _javascript skills

Before writing a program, you should understand the composition of the ID number:

The ID card number is divided into two, the old one is 15 digits, the new one is 18 digits.

ID 15-bit encoding rule: dddddd YYMMDD xx p

Where DDDDDD: Region code yymmdd: birth date XX: Sequence class code, cannot determine p: sex, odd for male, even for female;

ID 18-bit encoding rule: dddddd yyyymmdd xxx y

Among them dddddd: region code YYYYMMDD: birth date XXX: Sequence class code, cannot determine, odd number is male, even is female y: Check code, this bit value can be obtained by the first 17 digits calculation, the formula of calculation see program, Some constants need to use :

The 18-digit number weighting factor is (from right to left) Wi = [7, 9, 5, 8, 4, 2 , 1, 6, 3, 7, 9, ten, 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), one)

I for the ID card number from the right to the left number of 2...18 bit; Y_p is the location of the check code array for the foot check code.

var Wi = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1];   Weighted 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, ""));  Remove the string and tail space if (idcard.length = =) {return Isvaliditybrithby15idcard (Idcard);    Verification of 15-bit IDs} else if (Idcard.length =) {var A_idcard = Idcard.split (""); Get ID card array if (Isvaliditybrithby18idcard (Idcard) &&istruevalidatecodeby18idcard (A_idcard)) {// 
  Basic authentication for 18-bit IDs and 18th-bit validation return true; 
  }else {return false; 
 } else {return false; }/** * Determines whether the final verification bit is correct when the ID number is 18 * @param a_idcard ID Number array * @return/function Istruevalidatecodeby18idcard (a        _idcard) {var sum = 0;     Declares a weighted sum variable if (a_idcard[17].tolowercase () = = ' x ') {a_idcard[17] = 10;   Replace 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 captcha if (a_idcard[17] = = Validecode[valcodeposition]) {return true; 
 else {return false; }/** * Verify that the birthday in the 18-digit ID number is a valid birthday * @param idcard 18-digit ID card String * @return/function Isvaliditybrithby18idcard (IdC 
 ARD18) {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)); Use getFullYear () to get the year to avoid the bug problem if (Temp_date.getfullyear ()!=parsefloat () | | Temp_date.getmonth ()!=parsefloat (month)-1 | | 
 Temp_date.getdate ()!=parsefloat (Day)} {return false; 
 }else{return true; }/** * Verify that the birthday in the 15-digit ID number is a valid birthday * @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)); You don't need to consider the Millennium bug question about your age in your old ID card.Use the GetYear () method 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, "");  }

A gender determination based on the ID number

/** 
 * Through the identity card is a male or female 
 * @param idcard 15/18 ID card number 
 * @return ' female '-female, ' male '-male * * 
function Maleorfemalbyidcard (idcard) { 
 Idcard = Trim (idcard.replace (//g, ""));  Handle the ID card 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; 
 } 

The above is JavaScript verification ID number of the specific implementation method, and according to ID card can verify sex, is not very magical, welcome to learn from.