Hi Roee, > I am looking for a way to validate a credit card number using JavaScript. There are various JS scripts out there that check whether a credit card is valid. A few are located at the following URL-s: http://webdeveloper.earthweb.com/webjs/item/0,3602,12752_18781,00.html http://webdeveloper.earthweb.com/webjs/item/0,3602,12752_15781,00.html HTH Yours, Lauri -- (p.s. I haven't tested them myself but a lot of people are using them)