var startTime = (new Date()).getTime();
var _DT = new Date();
function formatetime() {
    var dd,mm,yy,s,hh,mn,se,str,week;
    var nowtime = new Date();
    nowtime.setFullYear(_DT.getFullYear());
    nowtime.setMonth(_DT.getMonth());
    nowtime.setDate(_DT.getDate());
    nowtime.setHours(_DT.getHours());
    nowtime.setMinutes(_DT.getMinutes());
    nowtime.setSeconds(_DT.getSeconds());
    nowtime.setTime(_DT.getTime()+((new Date()).getTime())-startTime);
    dd = nowtime.getDate() + "";
    if (dd.length == 1)
        dd = "0" + dd;
    mm = nowtime.getMonth() + 1 + "";
    if (mm.length == 1)
        mm = "0" + mm;
    yy = nowtime.getFullYear() + "";
    s = yy + "年" + mm + "月" + dd + "日 ";
    hh = nowtime.getHours() + "";
    if (hh.length == 1)
        hh = "0" + hh;
    mn = nowtime.getMinutes() + "";
    if (mn.length == 1)
        mn = "0" + mn;
    se = nowtime.getSeconds() + "";
    if (se.length == 1)
        se = "0" + se;
    str = s + hh + ":" + mn + ":" + se + " "
    week = nowtime.getDay();
    switch (week)
            {
        case 0 : week = "星期天";
            break;
        case 1 : week = "星期一";
            break;
        case 2 : week = "星期二";
            break;
        case 3 : week = "星期三";
            break;
        case 4 : week = "星期四";
            break;
        case 5 : week = "星期五";
            break;
        case 6 : week = "星期六";
            break;
    }
    str = str + week;
    document.getElementById("time").innerHTML = str;
}