JavaScript ID card number verification-supports new x ID card

1 // -- ID card number verification-new x ID card supported
2 function isIdCardNo (num)
3 {
4 var factorArr = new Array );
5 var error;
6 var varArray = new Array ();
7 var intValue;
8 var lngProduct = 0;
9 var intCheckDigit;
10 var intStrLen = num. length;
11 var idNumber = num;
12 // initialize
13 if (intStrLen! = 15) & (intStrLen! = 18 )){
14 // error = "the length of the ID card number entered is incorrect! ";
15 // alert (error );
16 // frmAddUser.txt IDCard. focus ();
17 return false;
18}
19 // check and set value
20 for (I = 0; I <intStrLen; I ++ ){
21 varArray [I] = idNumber. charAt (I );
22 if (varArray [I] <'0' | varArray [I]> '9') & (I! = 17 )){
23 // error = "Incorrect ID number !. ";
24 // alert (error );
25 // frmAddUser.txt IDCard. focus ();
26 return false;
27} else if (I <17 ){
28 varArray [I] = varArray [I] * factorArr [I];
29}
30}
31 if (intStrLen = 18 ){
32 // check date
33 var date8 = idNumber. substring (6, 14 );
34 if (checkDate (date8) = false ){
35 // error = "incorrect date information in ID card !. ";
36 // alert (error );
37 return false;
38}
39 // calculate the sum of the products
40 for (I = 0; I <17; I ++ ){
41 lngProduct = lngProduct + varArray [I];
42}
43 // calculate the check digit
44 intCheckDigit = 12-lngProduct % 11;
45 switch (intCheckDigit ){
46 case 10:
47 intCheckDigit = 'X ';
48 break;
49 case 11:
50 intCheckDigit = 0;
51 break;
52 case 12:
53 intCheckDigit = 1;
54 break;
55}
56 // check last digit
57 if (varArray [17]. toUpperCase ()! = IntCheckDigit ){
58 // error = "Incorrect ID card verification space! Correct: "+ intCheckDigit + ".";
59 // alert (error );
60 return false;
61}
62}
63 else {// length is 15
64 // check date
65 var date6 = idNumber. substring (6, 12 );
66 if (checkDate (date6) = false ){
67 // alert ("Incorrect ID Card Date !. ");
68 return false;
69}
70}
71 // alert ("Correct .");
72 return true;
73}