<form id="form1" runat="server">   
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
       
     <telerik:RadSplitter runat="server" id="mainSplitter" orientation="Vertical" width="100%" Height ="805px">
     
        <telerik:RadPane runat="server" id="LeftPane" Width = "250px">
          <asp:Panel ID="Panel1" runat="server">
              <asp:ContentplaceHolder ID="cpLeftNav" runat="server">
              </asp:ContentplaceHolder>
            </asp:Panel>
            </telerik:RadPane>
 
            <telerik:RadSplitBar runat="server" id="rsbLeft" CollapseMode="Forward" EnableResize="False" />
           
            <telerik:radpane runat="server" id="MiddlePane" Scrolling="None" >
         <asp:Panel ID="Panel2" runat="server"  Width="100%" >
               <asp:ContentPlaceHolder ID="cpContent" runat="server">              
               </asp:ContentPlaceHolder>
           </asp:Panel>
                </telerik:radpane></telerik:RadSplitter>
      
        <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="mainSplitter">
            <UpdatedControls>
            <telerik:AjaxUpdatedControl ControlID="mainSplitter" />
            </UpdatedControls>
            </telerik:AjaxSetting>
            </AjaxSettings> 
        </telerik:RadAjaxManager>
               
               
    </div>
    </form>
</body>
</html>

Content Page:

<%@ Page Language="C#" MasterPageFile="~/Main.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AJAXEnabledWebApplication3._Default" %>

<%@ Register Assembly="RadTabStrip.Net2" Namespace="Telerik.WebControls" TagPrefix="rad" %>

<%@ Register Assembly="RadAjax.Net2" Namespace="Telerik.WebControls" TagPrefix="rad" %>

<asp:Content ID="Content1" ContentPlaceHolderID="cpLeftNav" runat="server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
    <asp:Button ID="Button1" runat="server" Text="Button1" onclick="Button1_Click"
        />
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="cpContent" runat="server">
        
        
        
         <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />
    <asp:Button ID="Button2" runat="server" Text="Button2"
    onclick="Button2_Click" /><br /><br /><p></p>
    <script type="text/javascript">
            /*<![CDATA[*/
          
                function onTabClick(sender, eventArgs)
                {
                    window["<%= RadAjaxManager1.ClientID %>"].AjaxRequest(eventArgs);
                }
            /*]]>*/
            </script>

           
            <rad:RadAjaxManager id="RadAjaxManager1" runat="server" OnAjaxRequest="RadAjaxManager1_AjaxRequest">
                <AjaxSettings>
                    <rad:AjaxSetting>
                        <UpdatedControls >
                            <rad:AjaxUpdatedControl ControlID="RadTabS"></rad:AjaxUpdatedControl>                          
                        </UpdatedControls>
                    </rad:AjaxSetting>                   
                </AjaxSettings>
            </rad:RadAjaxManager>
<rad:RadTabStrip ID="RadTabS" MultiPageID="RadMultiP" runat="server">
<Tabs>
<rad:Tab runat="server" ID="tab1" Text="Tab1"></rad:Tab>
</Tabs>
</rad:RadTabStrip>
    <rad:RadMultiPage ID="RadMultiP" runat="server" >   
</rad:RadMultiPage> 
<asp:HiddenField runat="server" ID="hdnValue" />

<script type="text/javascript">
 debugger
        function CreateCloseImage(closeImageUrl)
        {
            var closeImage = document.createElement("img");
            closeImage.src = closeImageUrl;
            closeImage.style.marginTop = "2px";
            closeImage.style.position = "relative";
            closeImage.style.right = "-10px";          
            closeImage.alt = "Close this tab";         
            return closeImage;
        }
        function PreviousVisibleTab(currentTab)
        {
            for (var i = currentTab.Index - 1; i > -1; i--)
            {
                var tab = currentTab.Parent.Tabs[i];
               
                if (tab && tab.DomElement.style.display != "none")
                {
                    return tab;
                }
            }
            return null;
        }
       
        function NextVisibleTab(currentTab)
        {
            for (var i = currentTab.Index + 1; i < currentTab.Parent.Tabs.length; i++)
            {
                var tab = currentTab.Parent.Tabs[i];
               
                if (tab && tab.DomElement.style.display != "none")
                {
                    return tab;
                }
            }
            return null;
        }
       
        function SwitchTab(currentTab)
        {
         debugger
            var multiPage = <%= RadMultiP.ClientID %>;
           
            if (currentTab.Selected)
            {
                var previousTab = PreviousVisibleTab(currentTab);
               if (previousTab)
                {
                    previousTab.Select();
                }
                else
                {
                    var nextTab = NextVisibleTab(currentTab);
                    if (nextTab)
                    {
                        nextTab.Select();
                    }
                    else
                    {
                        multiPage.SelectPageByIndex(-1);
                    }
                }
            }
        }
        function AttachCloseImages(closeImageUrl)
        {
   debugger
            var tabStrip = <%= RadTabS.ClientID %>;
            for (var i = 0; i < tabStrip.AllTabs.length; i++)
            { 
            debugger        
                var tab = tabStrip.AllTabs[i];
                var closeImage = CreateCloseImage(closeImageUrl);
                closeImage.AssociatedTab = tab;
                closeImage.onclick = function(e)
               
                {
                if (!e) e = event;
                   
                    SwitchTab(this.AssociatedTab);
                    var tabIndex = this.AssociatedTab.Index;
                    document.getElementById("<%= hdnValue.ClientID%>").value =tabIndex;
                    this.AssociatedTab.DomElement.style.display = "none";                    
                    onTabClick("",tab.Text);                 
                    e.cancelBubble = true;
                    if (e.stopPropagation)
                    {
                       e.stopPropagation();
                    }
                 }
                tab.DomElement.firstChild.firstChild.innerHTML = "<span style='float:left'>" + tab.Text + "</span>";
                tab.DomElement.firstChild.firstChild.appendChild(closeImage);
            }
        }
         AttachCloseImages("close.gif");
        </script>
</asp:Content>


Please give me the right solution to close this issue...
Looking forward of ur reply

Regards
Jeyaraman

root = @"~\Data" + CurrentUser.SiteID + @"\";

editorMain.ImageManager.UploadPaths =

new string[1] { root + "Images"};

editorMain.ImageManager.ViewPaths =

new string[1] { root + "Images"};