httpData_monkey_patch.js

(function($){
  if(typeof DOMParser === 'undefined')return;
  var _httpData = $.httpData;
  $.httpData = function( xhr, type, s ) {
		var ct = xhr.getResponseHeader("content-type"),
    xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0,
    data = xml ? xhr.responseXML : xhr.responseText;
    if(!xml || data){
      return _httpData( xhr, type, s );
    }
    data = new DOMParser().parseFromString(xhr.responseText, "text/xml");
    if (data.documentElement.tagName == 'parsererror'){
      throw 'parsererror';
    }
    return data;
  };
})
(jQuery);