jQuery刷新插件

Hi i have this script http://jsbin.com/ajaneh , when i make an action throw ajax

$.ajax({
             type: "POST",
             url: domain+"/home/register_working_time/",
             dataType: 'json',
             data: data,
             success: function(dt){
                $("#work_time").timer({time:dt.timerTime, stopTimer : dt.stopTimer});
             }

});

plugin is not refreshing , i need to add stopTimer : false from php , but no reaction from timer , i think i have to refresh plugin , but how ? thank you !!!!

Update

Thank you for helping , i funded my mistake , value for stopTimer : false , was not boolean , and i added to check if (settings.stopTimer !== 'true') , and now it works

you mean something like clearTimeout(timer);

if (!settings.stopTimer) {
    timer = setInterval(do_time, 1000);
} else {
    clearTimeout(timer);
}