js实现网站运行时间统计

<spanid="sitetime"></span>

<scriptlanguage=javascript>

functionsiteTime(){

window.setTimeout("siteTime()",1000);

var seconds =1000;

var minutes = seconds *60;

var hours = minutes *60;

var days = hours *24;

var years = days *365;

var today =newDate();

var todayYear = today.getFullYear();

var todayMonth = today.getMonth()+1;

var todayDate = today.getDate();

var todayHour = today.getHours();

var todayMinute = today.getMinutes();

var todaySecond = today.getSeconds();

/* Date.UTC() -- 返回date对象距世界标准时间(UTC)1970年1月1日午夜之间的毫秒数(时间戳)

year - 作为date对象的年份，为4位年份值

month - 0-11之间的整数，做为date对象的月份

day - 1-31之间的整数，做为date对象的天数

hours - 0(午夜24点)-23之间的整数，做为date对象的小时数

minutes - 0-59之间的整数，做为date对象的分钟数

seconds - 0-59之间的整数，做为date对象的秒数

microseconds - 0-999之间的整数，做为date对象的毫秒数 */

var t1 =Date.UTC(2016,12,01,00,00,00);//北京时间2016-12-1 00:00:00

var t2 =Date.UTC(todayYear,todayMonth,todayDate,todayHour,todayMinute,todaySecond);

var diff = t2-t1;

var diffYears =Math.floor(diff/years);

var diffDays =Math.floor((diff/days)-diffYears*365);

var diffHours =Math.floor((diff-(diffYears*365+diffDays)*days)/hours);

var diffMinutes =Math.floor((diff-(diffYears*365+diffDays)*days-diffHours*hours)/minutes);

var diffSeconds =Math.floor((diff-(diffYears*365+diffDays)*days-diffHours*hours-diffMinutes*minutes)/seconds);

document.getElementById("sitetime").innerHTML=" 已运行"+diffYears+" 年 "+diffDays+" 天 "+diffHours+" 小时 "+diffMinutes+" 分钟 "+diffSeconds+" 秒"; }

siteTime();</script>