mfalac.com

try it here

some reason default margin value is em so you have to overwrite it!

.accordionHeader
{
    border: 1px solid #00000;
    color: black;
    font-family: Arial, Sans-Serif;
    font-size: 12px;
    font-weight: bold;
    padding: 5px;
    margin-top: 5px;
    cursor: pointer;
    margin: 3px;
    background: url(images/img07.gif) repeat-x;
}

.accordionContent
{
    background-color: white;
    border-top: none;
    padding: 5px;
    padding-top: 10px;
    margin: 1px;
    border-style: dashed;
    border-width: 1px;
    border-color: #2F4F4F;
}

and

<cc1:Accordion ID="Accordion2" runat="server"
                    SelectedIndex="0"
                    HeaderCssClass="accordionHeader"
                    HeaderSelectedCssClass="accordionHeader"
                    ContentCssClass="accordionContent"
                    AutoSize="None"
                    FadeTransitions="True"
                    TransitionDuration="250"
                    FramesPerSecond="40"
                    RequireOpenedPane="False"
                    SuppressHeaderPostbacks="true" DataSourceID="SqlDataSource1">
                    <HeaderTemplate>
                    <h4>
                            <%#(DataBinder.Eval(Container.DataItem, "Title"))%></h4>
                    </HeaderTemplate>
                    <ContentTemplate>
                     <%#(DataBinder.Eval(Container.DataItem, "Title"))%>
                           <br />
                                Posted by <%#(DataBinder.Eval(Container.DataItem, "UserName"))%> on
                                <%#(DataBinder.Eval(Container.DataItem, "Date"))%>
                            <p>
                                <%#(DataBinder.Eval(Container.DataItem, "Content"))%>
                            </p>
                    </ContentTemplate>
              </cc1:Accordion>

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