<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" >
 <head>
     <title></title>
     <script src="moment.js"></script>    
     <script type="text/javascript" language="javascript">            function getSharpTime(baseDate,hour,day_diff)
            {
               var myDateTime_tmp = baseDate;
               if(day_diff != '')
               {
                 myDateTime_tmp.add(day_diff, 'd');
               }
               myDateTime_tmp.hours(hour).minutes(0).seconds(0);
               return myDateTime_tmp;
            }     
             function GetWorkHours(beginDateTime, endDateTime) {
             //debugger;
             var _totalHour = 0;
             //1、获取开始时间和结束时间之间的日 
             var _beginDate = moment(beginDateTime);
             var _endDate = moment(endDateTime);
             //整理时间 
                         
             if (_beginDate.get("hour") < 8) 
             {
                 //开始时间小于8点，设置为8点
                 _beginDate = getSharpTime(_beginDate,8);                
             }
             else if (_beginDate.get('hour') == 12) 
             {
             
                 //开始时间在12点-13点之间，设置为13点
                 _beginDate = getSharpTime(_beginDate,13);
             }
             else if (_beginDate.get("hour") >= 17) 
             {
                 //_beginDate.add(1, 'd').hour(8);
                 _beginDate = getSharpTime(_beginDate,8,1);
             }
             
             if (_endDate.get("hour") > 17) 
             {
                 //结束时间大于17点，设置为17点
                 _endDate = getSharpTime(_endDate,13);
             }
             else if (_endDate.get('hour') == 12) 
             {
                 //结束时间在12点-13点之间，设置为12点
                 _endDate = getSharpTime(_endDate,12);            }
             else if (_endDate.get("hour") <= 8) 
             {
                 _endDate = getSharpTime(_endDate,17,-1);
             } 
             
             var _tempDateTime = _beginDate; //缓存一个日期，起始时开始时间
             while (moment(_tempDateTime).isBefore(_endDate)) 
             {
                 //2.1、判断是否周日，周六
                 //var _week = moment(_tempDateTime).weekday();
                 //if (_week == 0 || _week == 6) {
                     //是周末,不算入时间
                     //_tempDateTime.add(1, 'd');
                     //continue;
                 //}
                 if (moment(_tempDateTime).isSame(_beginDate, "day")) 
                 {
                     if (moment(_tempDateTime).isSame(_endDate, "day")) {
                         //开始时间和结束时间是同一天，结束时间-开始时间
                         _totalHour += _endDate.diff(_beginDate, "hours", true);
                         //如果跨越中午，减去一个小时
                         if (moment(_tempDateTime).get('hour') <= 12 && moment(_endDate).get('hour') > 12) 
                         {
                             _totalHour -= 1;
                         }
                         _tempDateTime.add(1, 'd');
                         continue;
                     }
                     else 
                     {
                         //开始时间和结束时间不是同一天，17点减-开始时间
                         _totalHour += moment(_beginDate).hour(17).minute(0).second(0).diff(_beginDate, "hours", true);
                         //如果跨越中午，减去一个小时
                         if (moment(_tempDateTime).get('hour') <= 12 ) 
                         {
                             _totalHour -= 1;
                         }
                         _tempDateTime.add(1, 'd').hour(8).minute(0).second(0);
                       
                         continue;
                     }
                 }
                 else if (moment(_tempDateTime).isSame(_endDate, "day")) 
                 {
                     //是否和结束时间是同一天,结束时间-开始时间8点，
                     _totalHour += _endDate.diff(moment(_endDate).hour(8).minute(0).second(0), "hours", true);
                     //如果跨越中午，减去一个小时
                         if (moment(_endDate).get('hour') > 12 ) 
                         {
                             _totalHour -= 1;
                         }
                     _tempDateTime.add(1, 'd');
                     continue;
                 }
                 else 
                 {
                     _totalHour += 8;
                     _tempDateTime.add(1, 'd');
                     continue;
                 }
             }
            //  alert(_totalHour < 0 ? 0 : _totalHour.toFixed(2));
 //
              return _totalHour < 0 ? 0 : _totalHour.toFixed(2);        }
     
     
         function GetTotalWorkHours(beginDateTime1, endDateTime1,beginDateTime2, endDateTime2) 
         {
            if(endDateTime2 == '' || beginDateTime1 == '' )
            {
               alert('date A 和  data D 不能为空');
            }
    
            if(endDateTime1 == '')
            {
                return   GetWorkHours(beginDateTime1 ,endDateTime2) ;           
            }
            else
            {
                if (beginDateTime2 == '')
                {
                   return   GetWorkHours(beginDateTime1 ,endDateTime1) ;   
                }
                else
                {
               // alert(GetWorkHours(beginDateTime1 ,endDateTime1));
               // alert(GetWorkHours(beginDateTime2 ,endDateTime2));
               var _totalhours1 = parseFloat(GetWorkHours(beginDateTime1 ,endDateTime1));  
               var _totalhours2 = parseFloat(GetWorkHours(beginDateTime2 ,endDateTime2));   
               var _totalhours = _totalhours1 + _totalhours2;              
              return _totalhours;
                }
            } 
         //beginDateTime1(A), endDateTime1(B),beginDateTime2(C), endDateTime2(D) 
          /*  
            3  计算逻辑
            
            当 B,C没有时，hour=D-A;           当B有C没有时 hour=B-A;
           当B,C都有时 hour= (B-A)+(D-C);
            */
         }     
     </script>
 </head>
 <body>
 时间1(A)：<input type = "text" id = "num1" value = "2016-05-28 12:01" /><br />
 时间2(B)：<input type = "text" id = "num2" value = "2016-05-29 14:00" /><br />时间3(C)：<input type = "text" id = "num3" value = "2016-05-29 18:31" /><br />
 时间4(D)：<input type = "text" id = "num4" value = "2016-05-30 11:00" /><br /><hr />
<input type = "text" id = "result" value = ""   />
 <button οnclick="document.getElementById('result').value = GetTotalWorkHours(document.getElementById('num1').value,document.getElementById('num2').value,document.getElementById('num3').value,document.getElementById('num4').value);">测试结果</button ><br />
 <input type="text" id = "b_a" value = "" /> 
 <button  οnclick="document.getElementById('b_a').value = GetWorkHours(document.getElementById('num1').value,document.getElementById('num2').value);">B-A</button><br />
 <input type="text" id = "d_a" value = "" /> 
 <button  οnclick="document.getElementById('d_a').value = GetWorkHours(document.getElementById('num1').value,document.getElementById('num4').value);">D-A</button><br />
 <input type="text" id = "d_c" value = "" /> 
 <button  οnclick="document.getElementById('d_c').value = GetWorkHours(document.getElementById('num3').value,document.getElementById('num4').value);">D-C</button><br /> 
</body>
 </html>