I have a 1textbox, 1dropdownlist, and a button. when you click the button asp:calendar will appear. I want to limit selection of date based on category. Let say, my dropdownlist is composed of. Overtime, Weekend, Holiday. If i choose Overtime, what i want is i cannot choose saturday and sunday date from my calendar. Also if i choose weekday, i should not allow to choose mon-fri from my calendar. How can i do this in asp.net/vb?

Thank you very much.