How to show the calendar control as a drop down

Hello

Basically i want to have a calendar control in the website from which a user can select a particular date, and that selected date than displays the date in the textbox. I have done something similar to that using the AJAX control toolkit.  but how do i do it without ajax.  Also, my first priority should be showing the calendar as a drop down and not as a calendar image but if drop down is not possible than even the normal way is fine. and it should have a validity which should not allow anyone to choose past date. it should only allow the current date and the rest of the month dates in the drop down.
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