date picker in gridview not popping - vs2010

My code:

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <asp:GridView runat="server" ID="MyGridView" AutoGenerateColumns="false">
        <Columns>
           <asp:BoundField DataField="Col1" HeaderText="Column 1" />
           <asp:BoundField DataField="Col2" HeaderText="Date 1" />
           <asp:BoundField DataField="Col3" HeaderText="Date 2" />
           <asp:TemplateField HeaderText="Date 2" >
                <EditItemTemplate>
                    <asp:TextBox ID="txtDate" CssClass="datepickerCompleted"
                        runat="server" Text="2011/1/1" ></asp:TextBox>
                </EditItemTemplate>
            </asp:TemplateField>        
           <asp:BoundField DataField="Col4" HeaderText="Date 3" />
           <asp:TemplateField HeaderText="Date 3"></asp:TemplateField>
        </Columns>
    </asp:GridView>
   <script type="text/javascript" language="javascript" src="<%= VirtualPathUtility.ToAbsolute("~/Script/jquery-1.4.1-vsdoc.js")%>"></script>
<script type="text/javascript">

    $(function () {
        $(".datepickerC开发者_如何学Pythonompleted").datepicker();
    });
</script>
</asp:Content>

Followed example from here: enter link description here

When I look at the source, i do not see any value populate in txtDate text box, which i suspect is then not firing the jquery method..

how do i debug?

---

Your code looks good, but the datepicker is part of jQuery UI which is a separate download/script--it's not included in the jquery-1.4.1 file, and it looks like that's the only script you have referenced.

EDIT: Here's an example that works for me:

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">

    <script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <script src="Scripts/jquery-ui-1.8.12.custom.min.js" type="text/javascript"></script>

    <script type="text/javascript">
        $(function () {
            $(".datepickerCompleted").datepicker();
        });
    </script>
</asp:Content>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

    <asp:GridView runat="server" ID="MyGridView" AutoGenerateColumns="false">
        <Columns>
           <asp:TemplateField HeaderText="Date 2">                
                <ItemTemplate>
                    <asp:TextBox ID="txtDate" CssClass="datepickerCompleted" runat="server" Text="2011/1/1" ></asp:TextBox>
                </ItemTemplate>
            </asp:TemplateField>        
        </Columns>
    </asp:GridView>

</asp:Content>

You can download a copy of jQuery UI here, and here's some more information on the datapicker.

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Based on the active/voted Answer, I think one more statement shall be added for better visibility of the datepicker. Otherwise it would be blurred/dimmed by the background. The proposed statement is put at 2nd line (assuming jquery-ui-1.8.14.custom.css file is downloaded & put in Css folder):

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">

<link type="text/css" href="Css/jquery-ui-1.8.14.custom.css" rel="Stylesheet" />
<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script src="Scripts/jquery-ui-1.8.12.custom.min.js" type="text/javascript"></script>
...