/* 往指定时间字符串上加时间间隔，获得新的时间字符串        * startDateStr：开始时间字符串，类似"2015-7-20 17:26:00"       * durationNumStr：持续时间数       * durationTypeStr：持续时间类型       * 返回类似：2015-7-20 17:26:00       *        *        */      function getEndDate(startDateStr, durationNumStr, durationTypeStr) {             var startDate = new Date(startDateStr.replace("-", "/").replace("-",                  "/"));          var duration_num = parseInt(durationNumStr);             var endDate = "";          if (durationTypeStr == "min") {              endDate = new Date(startDate.setMinutes(startDate.getMinutes()                      + duration_num));          }          if (durationTypeStr == "h") {              endDate = new Date(startDate.setHours(startDate.getHours()                      + duration_num));          }          if (durationTypeStr == "d") {              endDate = new Date(startDate.setDate(startDate.getDate()                      + duration_num));          }          if (durationTypeStr == "w") {              endDate = new Date(startDate.setDate(startDate.getDate()                      + duration_num * 7));          }          if (durationTypeStr == "m") {              endDate = new Date(startDate.setMonth(startDate.getMonth()                      + duration_num));          }          if (durationTypeStr == "y") {              endDate = new Date(startDate.setFullYear(startDate.getFullYear()                      + duration_num));          }             var year = endDate.getFullYear();          var month = endDate.getMonth() + 1 < 10 ? "0"                  + (endDate.getMonth() + 1) : endDate.getMonth() + 1;          var date = endDate.getDate() < 10 ? "0" + endDate.getDate() : endDate                  .getDate();          var hour = endDate.getHours() < 10 ? "0" + endDate.getHours() : endDate                  .getHours();          var minute = endDate.getMinutes() < 10 ? "0" + endDate.getMinutes()                  : endDate.getMinutes();          var second = endDate.getSeconds() < 10 ? "0" + endDate.getSeconds()                  : endDate.getSeconds();          var endDateStr = year + "-" + month + "-" + date + " " + hour + ":"                  + minute + ":" + second;          return endDateStr;      }         /**       * 计算开始时间是否小于结束时间，小于等于返回true，否则false       * startDateStr：开始时间字符串       * endDateStr：结束时间字符串       * 返回：true或false       *        *        */      function chkTime(startDateStr, endDateStr) {          //计划截止时间          var startDate = new Date(startDateStr.replace("-", "/").replace("-",                  "/"));          //计划详细项的截止时间          var endDate = new Date(endDateStr.replace("-", "/").replace("-", "/"));          if (startDate <= endDate) {              return true;          } else {              return false;          }      }