清除IE中Ajax缓存，Chrome不需要

// 设置Ajax操作的默认设置
$.ajaxSetup({
    cache: false,
    error: function (XMLHttpRequest, textStatus, errorThrown) {
        if (typeof (errorThrown) != "undefined")
            $.messager.alert(g_MsgBoxTitle, "调用服务器失败。<br />" + errorThrown, 'error');
        else {
            var error = "<b style='color: #f00'>" + XMLHttpRequest.status + "  " + XMLHttpRequest.statusText + "</b>";
            var start = XMLHttpRequest.responseText.indexOf("<title>");
            var end = XMLHttpRequest.responseText.indexOf("</title>");
            if (start > 0 && end > start)
                error += "<br /><br />" + XMLHttpRequest.responseText.substring(start + 7, end);

            $.messager.alert(g_MsgBoxTitle, "调用服务器失败。<br />" + error, 'error');
        }
    }
});