I am trying to apply a calendar extender to a textbox that I have on my form. My code looks like this:
<asp:TextBox ID="txtstart" runat="server" ></asp:TextBox>
<ajaxToolkit:CalendarExtender ID="extendertest" runat="server" TargetControlID="txtstart"></ajaxToolkit:CalendarExtender>
It compiles but when I hit run, this is what happens:
0x800a138f - JavaScript runtime error: Unable to get property 'UI' of undefined or null reference
Thoughts?