how to create submenus on mouse move event

<asp:Menu ID="CricketMenu" runat="server" CssClass="menu" EnableViewState="false" IncludeStyleBlock="false" Orientation="Vertical">
                    <Items>
                        <asp:MenuItem NavigateUrl="~/Series.aspx" Text="Series"/>




                        <asp:MenuItem NavigateUrl="~/Match.aspx" Text="Match"/>
                         <asp:MenuItem NavigateUrl="~/ScoreCard.aspx" Text="View Sore Card"/>
                        <asp:MenuItem NavigateUrl="~/Others.aspx" Text="Others"/>
                        <asp:MenuItem NavigateUrl="~/Analysis.aspx" Text="Analysis"/>
                        <asp:MenuItem NavigateUrl="~/CareerRecords.aspx" Text="Career Records"/>
                        <asp:MenuItem NavigateUrl="~/Points.aspx" Text="Points"/>
                        <asp:MenuItem NavigateUrl="~/Window.aspx" Text="Window"/>

                    </Items>
                </asp:Menu>