TreeView Selected Node on Context Menu

HI,
can any1 help me on this??
I am using Treeview and displaying ContextMenu on right Click.
But,i am not able to get the Value of the Clicked node.Plz help me on this.
<asp:Panel ID="Panel1" runat="server" Height="50px" Width="176px"> <asp:TreeView ID="TreeView1" runat="server" BackColor="#FFFFC0" Height="180px" Width="172px" onclientclick="treeView1MouseUp(treenode)"> <Nodes> <asp:TreeNode Text="Root" Value="sroot"> <asp:TreeNode Text="Parent 1" Value="sParent 1" onclick="cl"> <asp:TreeNode Text="<b oncontextmenu='return showmenuie5(event)' > this is a test</b>" Value="sLeaf 1" ></asp:TreeNode> <asp:TreeNode Text="Leaf 2" Value="sLeaf 2"></asp:TreeNode> & ...