短日期比较 js

function compareDate(startDate, endDate) {

                    var arr = startDate.split("-");

                    var starttime = new Date(arr[0], arr[1], arr[2]);

                    var starttimes = starttime.getTime();

                    var arrs = endDate.split("-");

                    var jstimes = new Date(arrs[0], arrs[1], arrs[2]);

                    var jstimes = jstimes.getTime();

                    if (starttimes > jstimes) {

                        return false;

                    }

                    else

                        return true;

                }