$("body").load("/someotherpath/feedsx.pxhp", {limit: 25},
    function (responseText, textStatus, req) {
        if (textStatus == "error") {
          return "oh noes!!!!";
        }
});

$.ajaxError(function(event, request, settings) {
      alert("Oops!!");
});

$.ajaxSetup({
    timeout: 5000,
    error: function(event, request, settings){
        alert("Oops!");
    }
});

$("#feeds").load("feeds.php", {limit: 25},
    function (responseText, textStatus, XMLHttpRequest) {
        // XMLHttpRequest.responseText has the error info you want.
        alert(XMLHttpRequest.responseText);
});