using Regular Expression in Javascript - how to validate a string

hi there

I am new to regular expressions and was looking for a javascript code which would validate a string which should contain 40 characteres from a-z or 0-9, for instance:

2ec04e0ae92046ec02cfss1d0306b074d9270580

Thank you
M

 

var str = '2ec04e0ae92046ec02cfss1d0306b074d9270580';
if (/^[a-z0-9]{40}$/i.test(str)) alert('OK');

Code (markup):

Regards

 

thank you!