날짜가 자동으로 오늘날짜로 변환되어 롤링되는 스크립트소스

<script>
today = new Date();
ty = today.getFullYear();
tm = today.getMonth()+1;
td = today.getDate();

if(tm<10)
tm = "0" + tm;
if(td<10)
td = "0" + td;

yesterday = new Date(today.valueOf()-(24*60*60*1000));
yy = yesterday.getFullYear();
ym = yesterday.getMonth()+1;
yd = yesterday.getDate();

if(ym<10)
ym = "0" + ym;
if(yd<10)
yd = "0" + yd;


document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
document.write
(yy + ym + yd +"김**"+"설치완료"+"<font color=red>"+"배송예정"+"</font>"+"<br>");
</script>