I am trying to intelligently pre-fill a form, I want to prefill the firstname and lastname inputs based on a user email address, so for example,

[email protected] RETURNS Jon Doe

[email protected] RETURN Jon Doe

[email protected] RETURNS Jon Doe

I have managed to get the string before the @,

var email = letters.substr(0, letters.indexOf('@'));

But cant work out how to split() when the separator can be multiple values, I can do this,

email.split(_)

but how can I split on other email address valid special characters?