js得到本日,本周,本月的起始时间和某月的最后一天

来源：互联网发布：魔兽大脚插件for mac 编辑：程序博客网时间：2024/06/11 04:08

1,得到当前时间

function getNowTime()
  {
    var d = new Date();
    var years = d.getYear();
    var month = add_zero(d.getMonth()+1);
    var days = add_zero(d.getDate());
     var hours = add_zero(d.getHours());
    var minutes = add_zero(d.getMinutes());
    var seconds=add_zero(d.getSeconds());
    var dateTime=years+"-"+month+"-"+days+" "+hours+":"+minutes;
    return dateTime;
  }

2.得到本周的第一天

function getWeekTime()
  {
    var d = new Date();
    var weekDay=d.getDay();
    if(weekDay==0)
    {
    weekDay=7;
    }
    var lw = new Date(d.getTime() - 1000 * 60 * 60 * 24 * (weekDay-1));
     var years = lw.getYear();
     var month = add_zero(lw.getMonth()+1);
     var days = add_zero(lw.getDate());
    var dateTime=years+"-"+month+"-"+days+" 00:00";
    return dateTime;
  }

3.得到本月的第一天

function getMothTime()
  {
    var d = new Date();
    var years = d.getYear();
    var month = add_zero(d.getMonth()+1);
    var dateTime=years+"-"+month+"-01 00:00";
    return dateTime;
  }

function add_zero(temp)
  {
   if(temp<10) return "0"+temp;
   else return temp;
  }

4.得到某月的最后一天

function getLastDay(){

var dt = new Date();

dt.setDate(1);

dt.setMonth(dt.getMonth()+1);

cdt = new Date(dt.getTime()-1000*60*60*24);

alert(cdt.getFullYear()+"年"+(Number(cdt.getMonth())+1)+"月月末日期:"+cdt.getDate()+"日");

}