js比较日期大小的方法

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;

}