var newTime = new Date().getTime();var oldTime = new Date().getTime();//相差的毫秒数var syhm =  newTime - oldTime;var h = Math.floor(syhm%(24*60*60*1000)/(60*60*1000))var m = Math.floor(syhm%(24*60*60*1000)%(60*60*1000)/(60*1000));var s = Math.floor(syhm%(24*60*60*1000)%(60*60*1000)%(60*1000)/1000);                    h = h<10 ? '0'+h : h;m = m<10 ? '0'+m : m;s = s<10 ? '0'+s : s;