Hi
Thinking again, would be simpler and faster with a for loop and substr() :
function comma(n , i)
{
for (i = index(n, ".") ? index(n, ".") - 3 : length(n) - 2; i > 1; i -= 2) {
n = substr(n, 0, i - 1) "," substr(n, i)
}
return n
}
Feherke.
feherke.github.io