Hi , I am using Infragistics WebDatePicker My Java script function code is like this function

isLastSigDateChecked()

{

if (document.getElementById("<%= chkLastSigDate.ClientID %>").checked == true)

{

var datapicker = $find("datLastSigDate");

datapicker.set_enabled(true);

}

else

{

var datapicker = $find("datLastSigDate"); datapicker.set_enabled(false);

} }

  But it is not working for me,i followed this code as per the Post posted from Infragistics Forums

I am getting the error in this line

datapicker.set_enabled(false);

so how to enable the webdatepicker when one checkbox checked=true

and to disable the webdatepicker when one checkbox checked=false

please let me know as quick response

Any Answer will be appreciated

thank you