How can I disable date/calendar control using client/server script & a Radio Button List as well ?

Hi,

I have a control of Date type say myDate. I want to disable it. If I use myDate.disabled = true; it doesn't work & I can still select a date.

I there a way to do this?

2) I have a list as well which is shown as Radio Button List which I want to disable. the .disabled also do not work with this. How to achieve this?

Thanks...