添加一个

timeout

$.ajax({        type : "GET",        url : "http://otherdomain.com/somePage.html",        data: params,        timeout:3000,        dataType : "jsonp",        jsonp : "jsonp",        success : function (response, textS, xhr) { alert("ok");        },        error : function (xmlHttpRequest, textStatus, errorThrown) { alert("not ok " + errorThrown);  if(textStatus==='timeout')   alert("request timed out");        }    });

演示