//*****************************************************
//AJAX -  JSON Service
//*****************************************************
var varType;
var varUrl;
var varData;
var varContentType;
var varDataType;
var varProcessData;
var returnValue = '';

function fnGetJSON(param_url, methodname, param, async) {
    varType = "GET";
    varUrl = param_url + methodname;
    varData = param;
    timeout = 100000;
    varDataType = "json";
    varProcessData = true;
    varContentType = "application/json; charset=utf-8";
    var isAsync = false;

    if (async == true)
        isAsync = async;

    $.ajax({
               url: varUrl,
               data: varData,
               type: varType,
               processdata: varProcessData,
               timeout: 10000,
               dataType: varDataType,
               contentType: varContentType,
               crossDomain: false,
               async: isAsync,
               success: (function (o) {
                   returnValue = o;
               }),
               error: (function () {
                   returnValue = '';
               })
           });

    return returnValue;
}