如何在jQuery中计算一年中的总周数? [英] How to calculate the total weeks in a year in jQuery?

问题描述

我想用HTML打印星期，年，即43,2013.同样，当我按下prev按钮时，它应该打印42,2013，在按下下一步时，我应该得到44,2013.

I want to print the week,year in HTML, ie 43,2013. Also when I press prev button it should print 42,2013 and on pressing next I should get 44,2013.

我能够做到一个月，一年，即October,2013，并获得下一个先前的月份，但是一周无法做到.

I'm able to do it for month,year ie October,2013 and getting next presvious months but unable to do it for week.

这是我一个月的代码.请帮我编写一周的代码.

Here is my code for month. Kindly help me in writing the code for week.

function monthNav(nav) {

  if(nav == 'prev') {

    var newMonth = cur_dat.getMonth() - 1;
    var newYear = cur_dat.getFullYear();
    if(newMonth < 0) {
      newMonth = 11;
      newYear -= 1;
    }

    cur_dat.setMonth(newMonth);
    cur_dat.setFullYear(newYear);
    curMonthYear = month[newMonth] + ", " + newYear;
    $("#mNav").html(curMonthYear);


  } else {

    var newMonth = cur_dat.getMonth() + 1;
    var newYear = cur_dat.getFullYear();
    if(newMonth > 11) {
      newMonth = 0;
      newYear += 1;
    }

    if(newYear == curYear && newMonth > curMonth) {
      return false;
    }
    cur_dat.setMonth(newMonth);
    cur_dat.setFullYear(newYear);
    curMonthYear = month[newMonth] + ", " + newYear;
    document.getElementById('periodVal').value=curMonthYear;
    $("#mNav").html(curMonthYear);

  }

}

推荐答案

尝试一下-

function getWeeks(d) {
 var first = new Date(d.getFullYear(),0,1); //start of the year
 var dayms = 1000 * 60 * 60 * 24;
 var numday = ((d - first)/dayms)
 var weeks = Math.ceil((numday + first.getDay()+1) / 7) ; 
 return weeks
}
alert(getWeeks(new Date("1 Dec 2012"))); //end of the year     

并在此处检查您的代码 http://jsbin.com/ugesex/29/edit

and check your code here http://jsbin.com/ugesex/29/edit

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