Compare two dates using javascript

function DateCompare(startDate, endDate) {
        var str1 = startDate;
        var str2 = endDate;
        if (Trim(str1) != '' && Trim(str2) != '') {
            var yr1 = parseInt(str1.substring(6, 10), 10);
            var mon1 = parseInt(str1.substring(3, 5), 10);
            var dt1 = parseInt(str1.substring(0, 2), 10);

            var yr2 = parseInt(str2.substring(6, 10), 10);
            var mon2 = parseInt(str2.substring(3, 5), 10);
            var dt2 = parseInt(str2.substring(0, 2), 10);
            var startDate1 = new Date(yr1, mon1, dt1);
            var endDate1 = new Date(yr2, mon2, dt2);
            if (startDate1 > endDate1) {
                return false;
            }
        }
        return true;
    }