Popup Menu Cell Click or Image Click

[Akhil Raj]

hi all,
  I need context menu in cell click or image button click instead of right click like popup menu
I have GridImageColumn in the grid. When i click the particluar cell or image i need to open my context menu and highlight the clicked row as selected and i can pass the selected row to the rad window.

I did except the row selection and id picking. Can anyone help me about this?

My page is:

  function showMenu(e)
    {
        var contextMenu = $find("<%= RadContextMenu1.ClientID %>");
        contextMenu.show(e);
//        $telerik.cancelRawEvent(e);
    }

    function MenuItemClicked(sender, eventArgs) {

            var clickedItemValue = eventArgs.get_item().get_text();
            switch(clickedItemValue)
            {
                case "Option2":
                var win = radopen("WebForm2.aspx?id=" + clickedItemValue, "RadWindow1");
                var oWnd = GetRadWindowManager().getActiveWindow();
                    oWnd.maximize();
                    return false;
                    break;
                default:
                    alert(clickedItemValue);
                    break;
            }
    }


</script>


    <Telerik:RadContextMenu id="RadContextMenu1" runat="server"
         EnableRoundedCorners="true" EnableShadows="true" OnClientItemClicked="MenuItemClicked">
    <Items>
        <Telerik:RadMenuItem Text="Option1" />
        <Telerik:RadMenuItem Text="Option2" />
        <Telerik:RadMenuItem Text="Option3" />
    </Items>
    </Telerik:RadContextMenu>

    <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" >
    <MasterTableView runat="server">
        <Columns>
            <telerik:GridTemplateColumn>
                <ItemTemplate>
                    <asp:ImageButton ID="imgMenu" runat="server" ImageUrl="" OnClientClick="showMenu(event)" />
                </ItemTemplate>
            </telerik:GridTemplateColumn>
            <telerik:GridImageColumn HeaderText="#" ImageUrl="" ></telerik:GridImageColumn>
            <telerik:GridBoundColumn HeaderText="User Name" DataField="UserName"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn HeaderText="First Name" DataField="FirstName"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn HeaderText="Last Name" DataField="LastName"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn HeaderText="Email" DataField="Email"></telerik:GridBoundColumn>
        </Columns>
    </MasterTableView>
    </telerik:RadGrid>
        <telerik:RadWindowManager ID="RadWindowManager1" ShowContentDuringLoad="false" VisibleStatusbar="false"
        ReloadOnShow="true" runat="server" EnableShadow="true">
        <Windows>
            <telerik:RadWindow ID="RadWindow1" runat="server" Behaviors="Close" >
            </telerik:RadWindow>
        </Windows>
    </telerik:RadWindowManager>

Here i can click and show the context menu by putting asp image in the template column but how can i get the row of the image and highlight the row?

Instead i try with GridImageColumn. But not found any cell click event or click  in Imagecolumn events. So how can i achive this?