Kendo UI Grid Virtual Scrolling

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.3.1119/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.3.1119/styles/kendo.silver.min.css">
<script src="http://cdn.kendostatic.com/2013.3.1119/js/kendo.web.min.js"></script>
<div id="customerGrid"></div>

CSS

html {
    font: 12px sans-serif;
}

JavaScript

var managecustomerGrid = $("#customerGrid").kendoGrid({
    dataSource: {
        type: "odata",
        transport: {
            read: "http://demos.kendoui.com/service/Northwind.svc/Orders"
        },
        schema: {
            model: {
                fields: {
                    OrderID: {
                        type: "number"
                    },
                    Freight: {
                        type: "number"
                    },
                    ShipName: {
                        type: "string"
                    },
                    OrderDate: {
                        type: "date"
                    },
                    ShipCity: {
                        type: "string"
                    }
                }
            }
        },
        serverPaging: true,
        serverSorting: true,
        serverFiltering: true,
        pageSize: 50,
        batch: false
    },
    toolbar: "toolbar template missing",
    height: 600,
    scrollable: {
        virtual: true
    },
    filterable: {
        operators: {
            string: {
                contains: "Contains",
                startswith: "Starts with",
                endswith: "Ends with",
                eq: "Is equal to",
                doesnotcontain: "Doesn't contain"
            }
        }
    },
    sortable: true,
    columns: [{
        field: "OrderID",
        title: "SR No.",
        width: "80px",
        template: "<span id='#=OrderID#'>#=OrderID#</span>"
    }, {
        field: "ShipName",
        title: "Ship Name",
        width: "110px"
    }, {
        field: "OrderDate",
        title: "Date",
        width: "110px"
    }, {
        command: ["edit", "detail", "cancel"],
        title: "&nbsp;",
        title: "Actions",
        width: "130px",
        filterable: false,
        sortable: false
    }]
});