JS strictly check the ID number

The following is the code based on the ID number encoding rules, using JS to validate it

<script type= "Text/javascript" >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 verification bit value. 10 represents X function Idcardvalidate (idcard) {Idcard = Trim (idcard.replace (//g, ""));       Remove String Kinsoku if (idcard.length = =) {return Isvaliditybrithby15idcard (Idcard);                Authentication for 15-bit ID} else if (idcard.length = =) {var A_idcard = Idcard.split (""); Get ID Array if (isvaliditybrithby18idcard (Idcard) &&istruevalidatecodeby18idcard (A_idcard)) {//base for 18-bit ID           This verification and the verification of the 18th bit return true;           }else {return false;       }} else {return false; }}/** * Determine if the last 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; Declares a weighted sum variable if (a_idCard[17].tolowercase () = = ' x ') {a_idcard[17] = 10;            Replace the last verification code of X with 10 to facilitate subsequent operation} for (var i = 0; i < i++) {sum + = wi[i] * A_idcard[i];                Weighted sum} valcodeposition = sum% 11;       Get the Verification code location if (a_idcard[17] = = Validecode[valcodeposition]) {return true;       } else {return false; }}/** * Verify that birthdays in 18-digit ID numbers are valid birthdays * @param idcard 18-bit book ID string * @return */function ISVALIDITYBRITHBY18IDCA       RD (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)); Get the year here with getFullYear () 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 birthdays in 15-digit ID numbers are valid birthdays * @param idCard15 15-bit book ID string * @return */function Isvaliditybri         Thby15idcard (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)); For the old ID, you do not need to consider the millennium bug problem and 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 Kinsoku function trim (str) {return str.replace (/(^\s*) | (   \s*$)/g, ""); } </script>

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JS strictly check the ID number