convert string with dot or comma as decimal separator to number in javascript

1function realParseFloat(s)
2{
3    s = s.replace(/[^\d,.-]/g, ''); // strip everything except numbers, dots, commas and negative sign
4    if (navigator.language.substring(0, 2) !== "de" && /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/.test(s)) // if not in German locale and matches #,###.######
5    {
6        s = s.replace(/,/g, ''); // strip out commas
7        return parseFloat(s); // convert to number
8    }
9    else if (/^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(s)) // either in German locale or not match #,###.###### and now matches #.###,########
10    {
11        s = s.replace(/\./g, ''); // strip out dots
12        s = s.replace(/,/g, '.'); // replace comma with dot
13        return parseFloat(s);
14    }
15    else // try #,###.###### anyway
16    {
17        s = s.replace(/,/g, ''); // strip out commas
18        return parseFloat(s); // convert to number
19    }
20}