How to split string into array of words

Is it possible to split a string like “Lorem ispum dolor, sit amet. Howdy doody.” into an array of words without commas and periods, in one operation?

I’ve tried words:Array = startString.split(String.fromCharCode(32,44,46));

i guess the reason my example doesn’t work is because it searced for " ,." to split the string… But how can i solve this.