js获取当前日期一年的第几周

获取当前日期一年中的第几周

     function theWeek() {
         var totalDays = ;
         now = new Date();
         years = now.getYear()
         if (years < )
             years +=
         var days = new Array();
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         days[] = ;
         //判断是否为闰年，针对2月的天数进行计算
         if (Math.round(now.getYear() / ) == now.getYear() / ) {
             days[] =
         } else {
             days[] =
         }
         if (now.getMonth() == ) {
             totalDays = totalDays + now.getDate();
         } else {
             var curMonth = now.getMonth();
             for (var count = ; count <= curMonth; count++) {
                 totalDays = totalDays + days[count - ];
             }
             totalDays = totalDays + now.getDate();
         }
         //得到第几周
         var week = Math.round(totalDays / );
         return week;
     }