I am implementing search on Umbraco site using examine and user control. On Home page search works fine, but in inner page it only searches that single page. second issue is of paging it is not sending post back request to the server. I checked the console in google chrome it display "undefined fuction _dopostback()" Please help me in resolving the two issues, I am pasting my user control code here.

SearchResults.ascx.cs

namespace Adding_Value.usercontrols
 {
public static class SiteSearchResultExtensions
{
    public static string FullURL(this Examine.SearchResult sr)
    {
        return umbraco.library.NiceUrl(sr.Id);
    }
}



public partial class SiteSearchResults : System.Web.UI.UserControl
{
    #region Properties

    private int _pageSize = 100;
    public string PageSize
    {
        get { return _pageSize.ToString(); }
        set
        {
            int pageSize;
            if (int.TryParse(value, out pageSize))
            {
                _pageSize = pageSize;
            }
            else
            {
                _pageSize = 100;
            }
        }
    }

    private string SearchTerm
    {
        get
        {
            object o = this.ViewState["SearchTerm"];
            if (o == null)
                return "";
            else
                return o.ToString();
        }

        set
        {
            this.ViewState["SearchTerm"] = value;
        }
    }

    protected IEnumerable<Examine.SearchResult> SearchResults
    {
        get;
        private set;
    }

    #endregion

    #region Events

    protected override void OnLoad(EventArgs e)
    {
        try
        {
            CustomValidator.ErrorMessage = "";

            if (!Page.IsPostBack)
            {
                topDataPager.PageSize = _pageSize;
                bottomDataPager.PageSize = _pageSize;

                string terms = Request.QueryString["s"];
                if (!string.IsNullOrEmpty(terms))
                {
                    SearchTerm = terms;
                    PerformSearch(terms);
                }
            }

            base.OnLoad(e);
        }
        catch (Exception ex)
        {
            CustomValidator.IsValid = false;
            CustomValidator.ErrorMessage += Environment.NewLine + ex.Message;
        }
    }

    protected void searchResultsListView_PagePropertiesChanging(object sender, PagePropertiesChangingEventArgs e)
    {
        try
        {
            if (SearchTerm != "")
            {
                topDataPager.SetPageProperties(e.StartRowIndex, e.MaximumRows, false);
                bottomDataPager.SetPageProperties(e.StartRowIndex, e.MaximumRows, false);
                PerformSearch(SearchTerm);
            }
        }
        catch (Exception ex)
        {
            CustomValidator.IsValid = false;
            CustomValidator.ErrorMessage += Environment.NewLine + ex.Message;
        }
    }

    #endregion

    #region Methods

    private void PerformSearch(string searchTerm)
    {
        if (string.IsNullOrEmpty(searchTerm)) return;
        //Node.GetCurrent();
        //Node Root = new Node(1050);
        //string rootNodeId = Root.Path.Split(',')[1];
        var criteria = ExamineManager.Instance
            .SearchProviderCollection["ExternalSearcher"]
            .CreateSearchCriteria(UmbracoExamine.IndexTypes.Content);

        //// Find pages that contain our search text in either their nodeName or bodyText fields...
        //// but exclude any pages that have been hidden.
        //var filter = criteria
        //    .GroupedOr(new string[] { "nodeName", "bodyText", "browserTitle", "tags", "mediaTags" }, searchTerm)
        //    .Not()
        //    .Field("umbracoNaviHide", "1")
        //    .Compile();

        //filter.And

        //SearchResults = ExamineManager.Instance
        //    .SearchProviderCollection["ExternalSearcher"]
        //    .Search(filter);

        Examine.SearchCriteria.IBooleanOperation filter = null;
        var searchKeywords = searchTerm.Split(' ');
        int i = 0;
        for (i = 0; i < searchKeywords.Length; i++)
        {
            if (filter == null)
            {
                filter = criteria.GroupedOr(new string[] { "nodeName", "bodyText", "browserTitle", "tags", "mediaTags" }, searchKeywords[i]);
            }
            else
            {
                filter = filter.Or().GroupedOr(new string[] { "nodeName", "bodyText", "browserTitle", "tags", "mediaTags" }, searchKeywords[i]);
            }
        }

        //only show results in the current path
        //var root = umbraco.NodeFactory.Node.GetNodeByXpath(+ umbraco.NodeFactory.Node.GetCurrent().Id + "]/ancestor-or-self::doctypealiasoftheroot");
        //GetNodeByXpath("$currentPage/ancestor-or-self::node [@level=1]");

        //filter.And().Field("SearchPath",rootNodeId);
        SearchResults = ExamineManager.Instance.SearchProviderCollection["ExternalSearcher"].Search(filter.Compile());

        if (SearchResults.Count() > 0)
        {
          // List<SearchResults>searchresuls = new List<SearchResults>();
          var  searchresuls = SearchResults.ToArray();
            for (int x = 0; x < SearchResults.ToArray().Length; x++)
            {
                if (searchresuls[x].Fields["bodyText"].Length > 300)
                {
                   searchresuls[x].Fields["bodyText"]=  searchresuls[x].Fields["bodyText"].Substring(0, 300)+"...";
                }
            }


            searchResultsListView.DataSource = searchresuls;// SearchResults.ToArray();

           searchResultsListView.DataBind();

            searchResultsListView.Visible = true;
            bottomDataPager.Visible = topDataPager.Visible = (SearchResults.Count() > _pageSize);
        }

        summaryLiteral.Text = "<p>Your search for <b>" + searchTerm + "</b> returned <b>" + SearchResults.Count().ToString() + "</b> result(s)</p>";

        // Output the query which an be useful for debugging.
        queryLiteral.Text = criteria.ToString();
    }

    #endregion
}
}

SearchResults.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SiteSearchResults.ascx.cs" Inherits="Adding_Value.usercontrols.SiteSearchResults" %>

  <%@ Import Namespace="Adding_Value.usercontrols" %>

 <div class="col-md-12" id="SiteSearchResults">            
<asp:ValidationSummary ID="ValidationSummary" runat="server" DisplayMode="List"  CssClass="validation" ValidationGroup="SiteSearchResults" />
<asp:CustomValidator ID="CustomValidator" runat="server" Visible="False" ValidationGroup="SiteSearchResults"></asp:CustomValidator>

<asp:Literal ID="summaryLiteral" runat="server" />

<div style="display:none;">
    <asp:Literal ID="queryLiteral" runat="server" />
</div>

<div id="TopPagingControls">
    <asp:DataPager ID="topDataPager" PagedControlID="searchResultsListView" PageSize="5" Visible="false" runat="server">
    <Fields>
        <asp:NextPreviousPagerField ShowNextPageButton="False" RenderDisabledButtonsAsLabels="true" Visible="false" />
        <asp:NumericPagerField ButtonCount="10" CurrentPageLabelCssClass="currentpage" Visible="false" />
        <asp:NextPreviousPagerField  ShowPreviousPageButton="False" RenderDisabledButtonsAsLabels="true" Visible="false" />
    </Fields>
    </asp:DataPager>
</div>

<div class="col-md-12" id="SearchResults">            
    <asp:ListView ID="searchResultsListView"  runat="server" ItemPlaceholderID="itemPlaceholder" OnPagePropertiesChanging="searchResultsListView_PagePropertiesChanging">
        <LayoutTemplate>
            <asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>       
        </LayoutTemplate>        
        <ItemTemplate>
            <li style="line-height: 15px;  list-style: none;">

                <a class="search-heading custom " href="<%# ((Examine.SearchResult)Container.DataItem).FullURL() %>">
                    <%# ((Examine.SearchResult)Container.DataItem).Fields["nodeName"] %>


                    <p class="search-link">
                    addingvalue.webdevstaging.co.uk<%# ((Examine.SearchResult)Container.DataItem).FullURL() %>
                        </p> 
                </a>

                <p class="search-content"><%# ((Examine.SearchResult)Container.DataItem).Fields.ContainsKey("bodyText") == true ? 
                                          ((Examine.SearchResult)Container.DataItem).Fields["bodyText"] : ""%></p>
            </li>
        </ItemTemplate>
        <ItemSeparatorTemplate></ItemSeparatorTemplate>
        <EmptyDataTemplate></EmptyDataTemplate>
    </asp:ListView>
</div>

<div id="BottomPagingControls">
    <asp:DataPager ID="bottomDataPager" PagedControlID="searchResultsListView" PageSize="5" Visible="False" runat="server">
    <Fields>
        <asp:NextPreviousPagerField ShowNextPageButton="False" RenderDisabledButtonsAsLabels="true" Visible="true" />
        <asp:NumericPagerField ButtonCount="5" CurrentPageLabelCssClass="currentpage" Visible="true"/>
        <asp:NextPreviousPagerField  ShowPreviousPageButton="false" RenderDisabledButtonsAsLabels="true" Visible="true" />
    </Fields>
    </asp:DataPager>
</div>
</div>