(1)把當前時間轉成時間戳

//把時間轉成時間戳
function timeTampToStr(){
   // 當前時間戳
   var timestamp = parseInt(new Date().getTime()/1000);    
   document.write(timestamp);
}

(2)當前時間換日期字串

//把當前時間轉成字串
function currentTimeChangeStr(){
   //獲取當前時間
   var now = new Date();
   //獲取當前時間的年份
   var yy = now.getFullYear();      //年
   //獲取當前時間的月份
   var mm = now.getMonth() + 1;     //月
   //獲取當前時間的日期
   var dd = now.getDate();          //日
   //獲取當前時間的小時
   var hh = now.getHours();         //時
   //獲取當前時間的分
   var ii = now.getMinutes();       //分
   //獲取當前時間的秒
   var ss = now.getSeconds();       //秒
   //把上述的時間轉成字串
   var clock = yy + "-";
   if(mm < 10) clock += "0";
   clock += mm + "-";
   if(dd < 10) clock += "0";
   clock += dd + " ";
   if(hh < 10) clock += "0";
   clock += hh + ":";
   if (ii < 10) clock += '0'; 
   clock += ii + ":";
   if (ss < 10) clock += '0'; 
   clock += ss;
   //獲取當前日期
   document.write(clock);   
} 
 

(3)日期字串轉時間戳

//日期字串轉成時間戳
//例如var date = '2015-03-05 17:59:00.0';
function dateStrChangeTimeTamp(dateStr){
   dateStr = dateStr.substring(0,19);
   dateStr = dateStr.replace(/-/g,'/');
   var timeTamp = new Date(dateStr).getTime();
   document.write(timesTamp);
}

(4)時間戳轉日期字串

//把時間戳轉成日期格式
//例如 timeTamp = '1425553097';
function formatTimeTamp(timeTamp){
   var time = new Date(timeTamp*1000);
   var date = ((time.getFullYear())  + "-" +
               (time.getMonth() + 1) + "-" +
               (time.getDate()) + " " +
               (time.getHour()) + ":" +
               (time.getMinutes()) + ":" +
               (time.getSeconds());
              )
   document.write(date);
}