刚学javascript遇到的问题——怎么算…

function weekNo() {

  var totalDays = 0;

  now = new Date();

  years=now.getYear()

  if (years < 1000)

  years+=1900

  var days = new Array(12);

  days[0] = 31;

  days[2] = 31;

  days[3] = 30;

  days[4] = 31;

  days[5] = 30;

  days[6] = 31;

  days[7] = 31;

  days[8] = 30;

  days[9] = 31;

  days[10] = 30;

  days[11] = 31;

   if (Math.round(now.getYear()/4) == now.getYear()/4) {

     days[1] = 29

  }else{

     days[1] = 28

  }

  if (now.getMonth() == 0) {

     totalDays = totalDays + now.getDate();

  }else{

     var curMonth = now.getMonth();

     for (var count = 1; count <= curMonth; count++) {

         totalDays = totalDays + days[count - 1];

     }

     totalDays = totalDays + now.getDate();

   }

   var week = Math.round(totalDays/7);

   return week;

}

function formatDate(date) {

return date.getFullYear() + "." + date.getMonth() + "." + date.getDate();

}

function firstAndFinalDayStr() {

var now = new Date();

var weeoDay = now.getUTCDay();

var firstDay = new Date();

firstDay.setDate(now.getDate() - weeoDay + 1);

var finalDay = new Date();

finalDay.setDate(now.getDate() + (7 - weeoDay));

return formatDate(firstDay) +"~" + formatDate(finalDay)+" "

}

function run() {

var info = "", no = weekNo();

info += firstAndFinalDayStr();

info += document.getElementByIdx_x("weekInfo").innerHTML = info;

}

run();

document.write("第 "+weekNo()+"周("+years+"年)")

// -->

看目前网上的时间显示，并没有这种显示的代码，写出来，希望能给大家更多的帮助。

更多信息，请点击：http://blog.sina.com.cn/u/2308368145