javascript 日期判斷，今天所在季度，第幾周，季度的第幾周，年度第幾周，

時間 2019-11-08

標籤 javascript 日期判斷今天所在季度幾周年度欄目 JavaScript 简体版

原文原文鏈接

<html>
<head>
  <title>日期判斷周月季年</title>
  <script type="text/javascript">
   var getMonthWeek = function (a, b, c) {
    var date = new Date(a, parseInt(b) - 1, c), w = date.getDay(), d = date.getDate();
    return Math.ceil( (d + 6 - w) / 7 );
   };

   var getYearWeek = function (a, b, c) {
    var date1 = new Date(a, parseInt(b) - 1, c), date2 = new Date(a, 0, 1),
    d = Math.round((date1.valueOf() - date2.valueOf()) / 86400000);
    return Math.ceil( (d + ((date2.getDay() + 1) - 1)) / 7 );
   };javascript

   var today = new Date();//獲取當前時間
   var y = today.getFullYear();
   var m = today.getMonth()+1;
   var d = today.getDate();
   document.write("今天是：",y,"-", m, "-", d, "<br/>");
   document.write( "今天是",y,"年的第 ", getYearWeek(y, m, d), " 周<br/>" );
   document.write( "今天是",m,"月的第 ", getMonthWeek(y, m, d), " 周<br/>" );
   var quarter = "";
   var result = getYearWeek(y, m, d);
   if (m <4) {
    quarter = 1;
    week = result;
   } else if (m < 7) {
    quarter = 2;
    week = result - getYearWeek(y, 4, 1);
    var day = new Date(y, 4, 1);
    if (day.getDay() > 1) {
     week += 1;
    }
   } else if (m < 10) {
    quarter = 3;
    week = result - getYearWeek(y, 7, 1);
    var day = new Date(y, 7, 1);
    if (day.getDay() > 1) {
     week += 1;
    }
   } else {
    quarter = 4;
    week = result - getYearWeek(y, 10, 1);
    var day = new Date(y, 10, 1);
    if (day.getDay() > 1) {
     week += 1;
    }
   }
   document.write( "今天是第",quarter,"季度的第 ", week, " 周" );
  </script>
</head>
<body>
</body>
</html>html

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