JavaScript Commander verification of bank card number implementation code _javascript tips

1, first introduced jquery.js

2, followed by the introduction of Luhmcheck.js//bank card number Luhm check

3, look at the following case:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
 
 

Here is JS

<script type= "Text/javascript" >
function Checkbankno (t_bankno) {
  var bankno = $.trim (T_bankno.val ()); c3/> if (Bankno = = "") {
    $ ("#banknoInfo"). HTML ("Please fill in the bank card number");
     return false;
   }
   if (Bankno.length < | | bankno.length >) {
     $ ("#banknoInfo"). HTML ("bank card number length must be between 16 to 19");
     return false;
   }
   var num =/^\d*$/; Full digit
   if (!num.exec (Bankno)) {
     $ ("#banknoInfo"). HTML ("bank card number must be all numbers");
     return false;
   }
   The opening 6-bit
   var strbin = " 10,18,30,35,37,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,58,60,62,65,68,69,84,87,88,94,95,98,99 ";
   if (Strbin.indexof (bankno.substring (0, 2)) = = 1) {
     $ ("#banknoInfo"). HTML ("the bank card number at the beginning of 6-bit does not conform to the specification");
     return false;
   }
   Luhm Checksum (new)
   if (!luhmcheck (bankno)) return
     false;
     $ ("#banknoInfo"). HTML ("Validate through!");
     return true;
   }
</script>

Test Card number:

1, 6222600810010710887

2, 6225881414207430

The above is a small set to introduce the JavaScript commander of the code to check the bank card number, hope to help everyone, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!