Ajax watermark problem in web page

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haii..in my code I add the Ajax water mark extender ,but it does't work..here is the code...

XML

<asp:ToolkitScriptManager ID="tsmMachine" runat="server">
                           </asp:ToolkitScriptManager>

XML

<span class="labelbox">
                                    <asp:Label ID="lblMainDisplay" runat="server" Text="Main Display"></asp:Label>
                                </span><span class="field">
                                    <asp:TextBox ID="txtMainDisplay" runat="server" CssClass="textbox" MaxLength="17"></asp:TextBox>
                                    <asp:TextBoxWatermarkExtender ID="tweMainDisplay" runat="server" WatermarkText="Up to 17 characters"
                                        WatermarkCssClass="watermarknormal" TargetControlID="txtMainDisplay">
                                    </asp:TextBoxWatermarkExtender>
                                </span>
                                <span class="labelvalidate">
                                    <asp:RequiredFieldValidator ID="rfvMainDisplay" runat="server" ErrorMessage="*" ControlToValidate="txtMainDisplay"
                                        SetFocusOnError="true" ValidationGroup="MachineDetails"></asp:RequiredFieldValidator>
                                </span>

have any error? plx help...

Posted 31-Oct-12 21:10pm

aravindnass

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Mohamed Mitwalli 1-Nov-12 4:10am

Well I test your code and it's work fine with IE , firefox ,netscape ,safari ,Opera etc ..............

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Alesha Mary Milred Fernandes · Answer 1 · 2012-11-02T00:51:00

Have you added the Ajax toolkit to your page?I mean the dll! :) TextBoxWatermarkExtender AJAX extender can be attached to an ASP.NET TextBox control to get "watermark" behavior. When a watermarked TextBox is empty, it displays a message to the user with a custom CSS style(i.e your css file)The asp:TextBoxWatermarkExtender has the following main properties given below:
TargetControlID - The ID of the TextBox(name of the textbox where you want the watermark) to operate on.
WatermarkText - The text to show when the control has no value.(default text as watermark)
WatermarkCssClass - The CSS class to apply to the TextBox when it has no value.

<pre lang="vb"><ajaxToolkit:TextBoxWatermarkExtender ID="TBWE2" runat="server"
    TargetControlID="TextBox Name"
    WatermarkText="Watermark text"
    WatermarkCssClass="watermarked" />