Validation for resultset in javascript

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C#

Javascript

Hi All,

I am calling webservice via my javascript. I have written validation when my resultset will be null, but when the select from my stored procedure will return no rows,it gets the data in my result variable as {"Table":[]} How do i validate this?
Here's my onSucess function:

function onSuccessBindWidgetInvoice(result) {
    debugger;
    if (result != null) {
        if (pgrInvoices == null && pgrInvoices == undefined) {
            widgetId = 'widgetInvoices';        

            var loadedResult = Sys.Serialization.JavaScriptSerializer.deserialize(result);
            if (loadedResult.Table.length > 0) {
                widgetTitle = loadedResult.Table[0].ItemType;
                var getWidgetHtmlMarkup = getWidgetHtml(widgetId, widgetTitle);
                if ($get(widgetId) != null && $get(widgetId) != undefined) {
                    var htmlMarkup = getWidgetHtmlMarkup + createRows(loadedResult.Table.length, loadedResult.Table, widgetId);
                    var htmlMarkup = htmlMarkup + createPager(widgetId);
                    $get(widgetId).innerHTML = htmlMarkup;
                    pgrInvoices = $create(GEP.Scripts.Pager, { 'ImagePath': '../images/' }, null, null, $get('dvPager_' + widgetId));
                    pgrInvoices.set_WebServiceFn(bindWidgetInvoice);
                    pgrInvoices._ddlPageSize.value = 10;
                    pgrInvoices.set_StartIndex(1);
                    pgrInvoices.set_PageSize(5);
                    pgrInvoices.set_TotalCount(loadedResult.Table[0].TotalCount);
                }
                else
                    alert('Unable to attach ' + widgetId);
            }

        }
        else {
            widgetId = 'widgetInvoices';        
            var loadedResult = Sys.Serialization.JavaScriptSerializer.deserialize(result);
            if (loadedResult.Table.length > 0) {
                widgetTitle = loadedResult.Table[0].ItemType;
                if ($get(widgetId) != null && $get(widgetId) != undefined) {
                    var htmlRowMarkup = '';
                    htmlRowMarkup = createRows(loadedResult.Table.length, loadedResult.Table, widgetId);
                    $get('placedivAttContent_' + widgetId).innerHTML = htmlRowMarkup;
                    pgrInvoices.set_TotalCount(loadedResult.Table[0].TotalCount);
                }
                else
                    alert('Unable to attach ' + widgetId);
            }
        }
    }
    changeLoadingImgVisibility();
    $(document).ready(function () {
        //$('#widgetOrders').hide();
        $('#widgetInvoices').fadeIn(900);
    });
}