/**
* Formats given number with comas, i.e for given
* `12345` returns `"12,345"`.
* The second (optional) argument redefines default
* thouthands delimiter (comma).
*/
thouthands: function(n, delim) {
delim = delim != undefined ? delim : ','
x = (n + '').split('.')
x1 = x[0]
x2 = x.length > 1 ? '.' + x[1] : ''
var rgx = /(\d+)(\d{3})/
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + delim + '$2')
}
return x1 + x2
}