Regular Expression: Any character that is NOT a letter or number

Question

I\'m trying to figure out the regular expression that will match any character that is not a letter or a number. So characters such as (,,@,£,() etc ...

Once found I

Answer 1

This is way way too late, but since there is no accepted answer I'd like to provide what I think is the simplest one: \D - matches all non digit characters.

var x = "123 235-25%";
x.replace(/\D/g, '');

Results in x: "12323525"

See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions