how to get the text of a linkbutton(Linkbutton is in a repeater control) that is right clicked?

I am developeing a web application in asp.net.In my application I have a form which contains a Repeater control.In repeater I am using a linkbutton. The link button text comes from database.I have used a javascript to display a contextmenu when a link button is rightclicked. The contextmenu contains options like "Create","Update" and "Delete". So when any of the context menu item is clicked a modelpopup will be displayed. Till this part it worked fine, my problem is "I want the linkbutton text on which i have made rightclick", because i need to use the linkbutton text in the modelpopup.

The following is my repeater.And the javascript is for displaying conextmenu on right click of linkbutton

    <asp:Repeater ID="Repeater1" runat="server" onitemdatabound="Repeater1_ItemDataBound">
    <ItemTemplate>
    <asp:LinkButton ID="context" runat="server" CssClass ="folder" oncontextmenu="javascript:return oCustomContextMenu.Display(event);" onclick="context_Click" />
    </ItemTemplate> 
    </asp:Repeater> 

 protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
        {
            string culture = e.Item.DataItem as string;
            LinkButton hypCulture = e.Item.FindControl("context") as LinkButton;
            hypCulture.Text = culture;
        }
    }

The javascript which i got from net is working fine for me.The following is js

    <script type="text/javascript">
    var oCustomContextMenu = null;
    var oBase = null;
    window.onload = function () {
    oBase = document.getElementById('div');
    var Arguments = {
                Base: oBase,
                Width: 200,
                FontColor: null,
                HoverFontColor: null,
                HoverBackgroundColor: null,
                HoverBorderColor: null,
                ClickEventListener: OnClick
            };

            oCustomContextMenu = new CustomContextMenu(Arguments);
            oCustomContextMenu.AddItem('Images/ei0019-48.gif', 'Create', false, 'Create');
            oCustomContextMenu.AddSeparatorItem();
            oCustomContextMenu.AddItem('Images/ei0020-48.gif', 'Update', false, 'Update');
            oCustomContextMenu.AddSeparatorItem();
            oCustomContextMenu.AddItem('Images/Delete-icon.png', 'Delete', false, 'Delete');
        }
        var OnClick = function (Sender, EventArgs) {
            switch (EventArgs.CommandName) {
                case 'Create':
                    $find('FstModelPopUp').show();
                    break;
                case 'Update':
                   break;
                case 'Delete':
                  break;
            }

            oCustomContextMenu.Hide();
        }

        window.onunload = function () { oCustomContextMenu.Dispose(); }
    </script>

The following is used for displaying model popup on context menu item click

    <asp:ModalPopupExtender ID="FstModelPopUp" runat="server" TargetControlID="BtnFstModelPopUp" PopupControlID ="PnlFstModelPopUp"
    Drag="true" DropShadow ="true" BackgroundCssClass="modalBackground" CancelControlID="btncancel">

Now i want to use the rightclicked linkbutton text in the modelpopup..how to do that

Please provide me solution with example

Regards,HarikaKrishna