From: Harlan Messinger on
Mark Rae [MVP] wrote:
> " Cal Who" <CalWhoNOSPAM(a)roadrunner.com> wrote in message
> news:ht9l9g$dti$1(a)news.eternal-september.org...
>
>> Why the null??
>
> Because of ASP.NET's control ID munging.
>
> var control = document getElementById('<%=MyControl.ClientID%>');
>
>
He did that, but at the point where his SetMargins function was called.