Commas messing with number input in Javascript

Question

I have a page with some elements that are controlled by the user. One of these is a text input field, where the user is supposed to input a number. Everything works well if

Answer 1

Use a global regular expression to replace all commas with an empty string:

var str = "12,345,678";
str = str.replace(/,/g, "");
parseInt(str, 10);