Bank IFSC code validation using Javascript or jquery

Introduction 

Here is a validation code for bank IFSC code.

IFSC code format : 
- Starting 4 should be only alphabets[A-Z]
- Remaining 7 should be accepting only alphanumeric

Code

1. <script type="text/javascript">  
2. $(document).ready(function(){   
3.       
4. $(".ifsc").change(function () {    
5. var inputvalues = $(this).val();    
6.   var reg = /[A-Z|a-z]{4}[0][a-zA-Z0-9]{6}$/;  
7.                 if (inputvalues.match(reg)) {  
8.                     return true;  
9.                 }  
10.                 else {  
11.                      $(".ifsc").val("");  
12.                     alert("You entered invalid IFSC code");  
13.                     //document.getElementById("txtifsc").focus();  
14.                     return false;  
15.                 }  
16. });    
17.   
18. });  
19. </script>  
20.   
21. IFSC : <input type="text" class="ifsc">