[Solved] QueryString value returns NAN set using jQuery in ASP.Net

 Please help i am trying to assign a value to a string but the string comes with NaN

Dim saleprice As String = Request.QueryString("saleprice")
              

this bring  this "8000NaN" instead on 8000 how can i correct this

<script src="../Scripts/jquery-1.8.3.min.js"></script>
<script src="ASPSnippets_Pager.min.js"></script>
<script type="text/javascript">       
 
        $(function () {
            GetCustomers(1);
        });
        $("[id*=txtSearch]").live("keyup", function () {
            GetCustomers(parseInt(1));
        });
        $(".Pager .page").live("click", function () {
            GetCustomers(parseInt($(this).attr('page')));
        });
 
        function SearchTerm() {
            return jQuery.trim($("[id*=txtSearch]").val());
        };
        function GetCustomers(pageIndex) {
            $.ajax({
                type: "POST",
                url: "Searchagain.aspx/GetCustomers",
                data: '{searchTerm: "' + SearchTerm() + '", pageIndex: ' + pageIndex + '}',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess,
                failure: function (response) {
                    alert(response.d);
                },
                error: function (response) {
                    alert(response.d);
                }
            });
        }
        var row;
        function OnSuccess(response) {
            var xmlDoc = $.parseXML(response.d);
            var xml = $(xmlDoc);
            var customers = xml.find("Customers");
            if (row == null) {
                row = $("[id*=SearchGrid] tr:last-child").clone(true);
            }
            $("[id*=SearchGrid] tr").not($("[id*=SearchGrid] tr:first-child")).remove();
            if (customers.length > 0) {
                $.each(customers, function () {
                    var customer = $(this);
                    $("td", row).eq(0).html($(this).find("itemcode").text());
                    $("td", row).eq(1).html($(this).find("stockitem").text());
                    $("td", row).eq(2).html($(this).find("itemsize").text());
                    $("td", row).eq(3).html($(this).find("Colour").text());
                    $("td", row).eq(4).html($(this).find("costprice").text());
                    $("td", row).eq(5).html($(this).find("saleprice").text());
                    $("td", row).eq(6).find("a").attr("href", "Client.aspx?itemcode=" + encodeURI($(this).find("itemcode").text()) + "&stockitem=" + encodeURI($(this).find("stockitem").text()) + "&itemsize=" + encodeURI($(this).find("itemsize").text()) + "&Colour=" + encodeURI($(this).find("Colour").text()) + "&Costprice=" + encodeURI($(this).find("costprice").text()) + "&saleprice=" + encodeURI($(this).find("saleprice").text()) + + "&account=" + encodeURI($(this).find("account").text()));


                   
                    $("[id*=SearchGrid]").append(row);
                    row = $("[id*=SearchGrid] tr:last-child").clone(true);
                });
                var pager = xml.find("Pager");
                $(".Pager").ASPSnippets_Pager({
                    ActiveCssClass: "current",
                    PagerCssClass: "pager",
                    PageIndex: parseInt(pager.find("PageIndex").text()),
                    PageSize: parseInt(pager.find("PageSize").text()),
                    RecordCount: parseInt(pager.find("RecordCount").text())
                });
 
                $(".stockitem").each(function () {
                    var searchPattern = new RegExp('(' + SearchTerm() + ')', 'ig');
                    $(this).html($(this).text().replace(searchPattern, "<span class = 'highlight'>" + SearchTerm() + "</span>"));
                });
            } else {
                var empty_row = row.clone(true);
                $("td:first-child", empty_row).attr("colspan", $("td", row).length);
                $("td:first-child", empty_row).attr("align", "center");
                $("td:first-child", empty_row).html("No records found for the search criteria.");
                $("td", empty_row).not($("td:first-child", empty_row)).remove();
                $("[id*=SearchGrid]").append(empty_row);
            }
        };
    </script>
</head>