Kendo DataSource Error in different Browser

[Engifaar]

$(document).ready(function () {
    $("#grid").kendoGrid({
        dataSource: reportDS,
        columns: [
                    { field: "ProductID", title: "Product ID", width: "25%" },
                    { field: "ProductName", title: "Product Name", width: "25%" }
                 ]
    }); 
});
var urls = "http://....../GetData";
var reportDS = new kendo.data.DataSource({
transport: {
        read: {
            url: urls,
            dataType: "jsonp",
        }
    },
    schema: {
        type: "json",
        data: function (data) { return eval(data.Result); }
    },
    requestStart: function (e) {
        alert("Requested Started");
    },
    change: function (e) {
        alert("Change");
    },
    error: function (xhr, textStatus) {
        alert("Error : " + xhr.xhr.status);
    },
    /*error: function (e) {
    var xhr = e.xhr;
    var statusCode = e.status;
    var errorThrown = e.errorThrown;
    document.getElementById("Error").innerHTML = xhr + statusCode + errorThrown;
    },*/
});




Hello,
I am trying to trace server error like

400	Bad Request
401	Unauthorized
402	Payment Required
403	Forbidden
404	Not Found
405	Method Not Allowed

and want to display custom message for user.  
Above code work fine when my service is running whereas when i stop my service and restart my kendo application. I get error Error : 200 as alert in internet Explore 8 and no message/alert box  in Google Chrome and FireFox..
Please help me out to clear my mistake...

Thanks and regard,
Deepak