C#: Right context menu target

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C#

ASP.NET

Javascript

hi guys,

This is my right context menu click event. I want to set a target in it. This context menu only for a image. it works proper on image. that have a option open window at new tab. i want from click event i want to do this option work.

when i click on this option the clicked image open at new window. it is done when i am do it from javascript code in aspx page. but know i want to that from click event in cs page. please help me.

protected void RadContextMenu1_ItemClick(object sender, Telerik.Web.UI.RadMenuEventArgs e)
   {

       if (e.Item.Text == "OpenInNewWindow")
       {
        
       }

   }

this is my javascript code in aspx page:

function showingSetAsDesktop(sender, args)

            {
                if (args.get_targetElement().id == "qsfexDesktop")

                    args.set_cancel(true);
            }

               function setAsDesktopItemClicked(sender, args)

            {
              var menuItemValue = args.get_item().get_value();

                 alert(args.get_targetElement().id);
                if (menuItemValue == "OpenInNewWindow")
                 {
                window.radopen(args.get_targetElement().src.replace("Thumb.gif", ".jpg"));
                 }

please help me in this..