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;}