Hi,
I am able to meet up your requirement in FireFox but not in IE. You can use it and do some reseach to display in IE.
The below code works fine in FF.
<div id="nav" class="nav">
<asp:Menu ID="Menu1" Orientation="Horizontal" runat="server">
<Items>
<asp:MenuItem Text="first" Value="first">
<asp:MenuItem Text="firstchild" Value="firstchild"></asp:MenuItem>
<asp:MenuItem Text="child" Value="child"></asp:MenuItem>
<asp:MenuItem Text="child2" Value="child"></asp:MenuItem>
<asp:MenuItem Text="child3" Value="child"></asp:MenuItem>
</asp:MenuItem>
<asp:MenuItem Text="second" Value="second">
<asp:MenuItem Text="child" Value="child"></asp:MenuItem>
</asp:MenuItem>
</Items>
</asp:Menu></div>
Add the below line into your Css file
#nav table { display:inline;}
#nav tr { display:inline; }
#nav td { display:inline;}
#nav a {display:inline;}
Hope this will work for u...
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