Question

There is lots of answers for that question on SO but none for javascript…

How can I check if first 16 characters of this sting 20130203003002od is a number? Meaning that the substring doesn’t contains any letters nor any other characters but digits?

Answer 1

You could test the string against a regular expression like so:

var data = "20130203003002od";
var matched = data.match("[0-9]{16}.*");

If matched is NULL, that means that the first 16 characters are not a number.