问JQuery在Chrome中搁置和等待ajax请求

EN

var request = ( typeof request != 'undefined' && request instanceof Array ) ? request : [];
var pendingAjax = ( typeof pendingAjax != 'undefined' && pendingAjax instanceof Array ) ? pendingAjax : [];

var ajaxActive = 0;
$( document ).ajaxStart(function() {
  ajaxActive++;
  document.ajaxQueueFull = ajaxActive > 5;
});
$(document).ajaxStop(function() {
  ajaxActive--;
  document.ajaxQueueFull = ajaxActive > 5;
}

    function ajaxRequestNew(t, u, d, s) {

        var instance = request.length + 1;
        request[instance] = $.ajax({
            method: t,
            url: u,
            data: {ajaxPost: d },
            success: s
        });
        return instance;
    }

    var instance = ajaxRequestNew('POST', 
                                  'js/ajax_timezone.php', 
                                  { ajaxAction : "ajaxGetTimezone", 
                                    tzoffset : "0", 
                                    tztimezone: "America/New_York" },
                                    function(data) {  }
    );

    while(request[instance] === null || (request[instance].readyState < 1 || request[instance].readyState > 4)) {
        if (document.ajaxQueueFull) {
            //abort existing requests
            $.each(request, function(i,v) {
                if (i !== instance) {
                    request[i].abort();
                }
            });
        }
    }

    pendingAjax.push(request[instance]);

  var timezoneFailCallback = function(data) {
        console.log('fail');
        console.dir(data);
    };

    var timezoneSuccessCallback = function(data) {
        console.log('success');
        console.dir(data);
    };

    $.when.apply($, pendingAjax).done( timezoneSuccessCallback ).fail( timezoneFailCallback);