js ID number is determined with n

When the user registration information will be used to modify or regular expressions to determine the ID number, you can directly call the function

1  // Analyzing ID number 
2          function idCardFn (idCard) {
 . 3              var REG = / ^ \ D { . 6 } ( 18 is | . 19 | 20 is ?) \ D { 2 } ( 0 [ . 19 ] | 1 [ 12 is ] ) ( 0 [ . 1 - . 9 ] | [ 12 is ] \ D | . 3 [ 01 ]) \ D { . 3 } (\ D | X-) $ / I;
 . 4              IF (! reg.test (idCard)) {
 . 5                  Layer. MSG ( 'Incorrect identification number format ' );
 . 6                  the console.log ( ' ID number error ' , idCard);
 . 7                  return  to false ;
 . 8              } the else {
 . 9                  the console.log ( ' ID number is correct ' , idCard);
 10              }
 . 11          }

    idCardFn (idCard); // can be called directly