JavaScript的时间日期格式化

function ChangeDateToString(DateIn){
			
    var Year = 0;
    var Month = 0;
    var Day = 0;
			
    var CurrentDate = "";
			
    //初始化时间
    Year  = DateIn.getYear();
    Month  = DateIn.getMonth()+1;
    Day  = DateIn.getDate();
			
    CurrentDate = Year + "-";
    if (Month >= 10 ){
        CurrentDate = CurrentDate + Month + "-";
    } else{
        CurrentDate = CurrentDate + "0" + Month + "-";
    }
    if (Day >= 10 ){
        CurrentDate = CurrentDate + Day ;
    } else{
        CurrentDate = CurrentDate + "0" + Day ;
    }

    return CurrentDate;
}