Uncaught TypeError: Cannot read property 'replace' of undefined

[s3c-krd]

trafficstars

function substitute(stringOrFunction, number) { var string = $.isFunction(stringOrFunction) ? stringOrFunction(number, distanceMillis) : stringOrFunction; var value = ($l.numbers && $l.numbers[number]) || number; return string.replace(/%d/i, value); }