$(function(){
    /**
     * ATTACH AJAX LISTENER TO BODY TO MAKE A GLOBAL
     * AJAX STATUS MONITOR FOR THE WHOLE PAGE.  ANY AJAX
     * CALL FROM ANY FUNCTION THAT RUNS ON THE PAGE
     * WILL AUTOMATICALLY REPORT ITS STATUS
     */
    $("body").ajaxStart(function(){
       $('#ajax_status_div').html("Ajax Request Sent");//update text message
       $('.activity_indicator').show(); //show ajax activity image(spinner gif)
    });
    $("body").ajaxSuccess(function(event,xmlHttp,options){
        var status = xmlHttp.statusText;
        var url = options.url;
        var data = options.data;
        $('.activity_indicator').hide(); //hide ajax activity image(spinner gif)
        $('#ajax_status_div').html("URL : "+url+"  <br/>  Status : "+status);//update text message
    });    
});