Form field auto reload ...

I've got a form in wich there's a field I want to reload every 2 seconds or when the user klicks the field, is there a simple way of doing this? I don't want to reload the whole page because then all the other information already entered will be lost.
Thanx
//Patrick

You can use either setTimeout or setInterval to get Javascript to keep on calling a function at a set time period.

t=setTimeout("yourfunction()",2000);
This will call yourfunction afert 2 seconds.
You will need to call this command again in your function.