object control = BrowserWindow.ExecuteScript('$('#yourControlId'););

protected void PerformAction(object control)
           {
                HtmlDiv htmldiv = ((List<object>)control)[0] as HtmlDiv;
                HtmlSpan htmlspan = null;

                if (htmldiv == null)
                {
                    htmlspan = htmldiv [0] as HtmlSpan ;

                    if (htmlspan == null) return;

                    // Write your action
                }

                if (htmldiv == null && htmlspan == null) return;
                // Do your code
            }