JavaScript日期判断,今天所在季度,第几周, 季度的第几周,年度第几周

jopen 6年前

<html>   <head>    <title>日期判断 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 );     };       var today = new Date();//获取当前时间     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>