<div class="menuzeile" dir="ltr">
                <asp:Menu ID="NavigationMenu" runat="server" cssClass="menu" _
                  StaticDisplayLevels="1"
                    EnableViewState="False" IncludeStyleBlock="False" _
                    Orientation="Horizontal">
                    <Items>
                        <asp:MenuItem NavigateUrl="~/Default.aspx" _
                          Text="Startseite" Value="Startseite"/>
                        <asp:MenuItem NavigateUrl="~/Default.aspx" _
                        Text="Irgendwas" Value="Irgendwas"/>
                        <asp:MenuItem NavigateUrl="~/About.aspx" Text="Info" _
                        Value="Info"/>
                    </Items>
                </asp:Menu>
            </div>

div.menuzeile
{
    background-color:#3a4f63;
    width:100%;
    text-align:center;
    margin-left:auto;
    margin-right:auto;
}
 
div.menu
{
    padding: 4px 0px 4px 0px;
    margin-left:50px; 
    width:300px;
    background-color: #00FF00;
}
 
div.menu ul
{
    list-style: none;
    margin: 1px 4px 1px 4px;
    padding: 0px;
    width: auto;
    text-align:center;
}
 
div.menu ul li a, div.menu ul li a:visited
{
    margin: 0px 4px 0px 4px;
    background-color: #FF0000; /*#465c71;*/
    border: 1px #4e667d solid;
    color: #dde4ec;
    display:block;
    line-height: 1.35em;
    padding: 1px 20px;
    text-decoration: none;
    white-space:nowrap;
}
 
div.menu ul li a:hover
{
    background-color: #bfcbd6;
    color: #465c71;
    text-decoration: none;
}
 
div.menu ul li a:active
{
    background-color: #465c71;
    color: #cfdbe6;
    text-decoration: none;
}