js比较日期大小的方法

本文实例讲述了js比较日期大小的方法。分享给大家供大家参考。具体如下：

function DateDiff(d1,d2){
var result = Date.parse(d1.replace(/-/g,"/"))- Date.parse(d2.replace(/-/g,"/"));
return result;
}
function DateDiff(d1,d2){    
   start_at = new Date(d1.replace(/^(\d{4})(\d{2})(\d{2})$/,"$1/$2/$3"));
   end_at = new Date(d2.replace(/^(\d{4})(\d{2})(\d{2})$/,"$1/$2/$3"));
   if(start_at > end_at) {
     return false;
   }
   return true;
}
//js获取当前日期
function currentDay(){
var mydate=new Date();
var mymonth=mydate.getMonth()+1;
var myday= mydate.getDate();
var myyear= mydate.getYear();
mymonth=mymonth<10?"0"+mymonth:mymonth;
myday=myday<10?"0"+myday:myday;
var day=myyear+"-"+mymonth+"-"+myday;
return day;
}

希望本文所述对大家的javascript程序设计有所帮助。