javascript日期与时间

 

1       取得当前日期

function getCurDate()

{

   today= new Date();

   year= today.getYear() + 1900;  

   month= today.getMonth() + 1;

   if (month<10){

month='0'+month;

   }

   day= today.getDate();

   if (day<10){

day='0'+day;

   }

   hours= today.getHours();

   if(hours<10){

hours='0'+hours;

   }

   minutes = today.getMinutes();

   if(minutes<10) minutes = '0'+minutes;

   seconds = today.getSeconds();

   if(seconds<10) seconds='0'+seconds

  

now = year + '-' + month + '-' + day + ' ' + hours + ":" + minutes + ":" + seconds;  

   return now;

}

2       求时间差

new Date().getTime()的值精确到毫秒值

2.1    计算相差的天数

Date date1 = new Date();

Date date2 = new Date();

var daydiff = (date1.getTime()-date2.getTime())/(24*60*60*1000);

2.2    计算相差的小时数

Date date1 = new Date();

Date date2 = new Date();

var hourdiff = (date1.getTime()-date2.getTime())/(60*60*1000);