var IssuedTime=new Date(selectRows.IssuedTime);
            //計劃下發年月日小時 
            var IssuedYear = IssuedTime.getFullYear();  
            var IssuedMonth = IssuedTime.getMonth()+1;  
            var IssuedDate = IssuedTime.getDate();    
            var IssuedHours = IssuedTime.getHours();  

            var date = new Date();
            //當前時間年月日小時  
            var NowYear = date.getFullYear();  
            var NowMonth = date.getMonth()+1;  
            var NowDate = date.getDate();    
            var NowHours = date.getHours();

//時間比較
   if (IssuedTime < date) {
                $.messager.alert(‘提示信息‘, "已經超過計劃發布日期，請確認！");
                return;
            }
         //時間計算

  // 給日期類對象添加日期差方法，返回日期與diff參數日期的時間差，單位為天
                //return (this.getTime() - date.getTime()) / (24 * 60 * 60 * 1000);
                debugger;
                var IssH = (IssuedTime - date) / (60 * 60 * 1000);

js date