js获取当前时间和一星期前的时间

[today516555]

时间：
<s:textfield name="search_site_time_gt" cssClass="date”
pattern="yyyy-MM-dd HH:mm:ss" readonly="true"></s:textfield>
-
<s:textfield name="search_site_time_lt" cssClass="date"
pattern="yyyy-MM-dd HH:mm:ss" readonly="true"></s:textfield>
<input type="hidden" name="search_site_time_order" value="1" />
<script type="text/javascript">
这里面要怎么写才能在第一个框显示出前一星期时间，后一框显示当时时间

[today516555]

我后来写的
<script type="text/javascript">
<!--
$(function (){
//取得当前时间
var now = new Date();
var year = now.getYear();
var month = now.getMonth()+1;
var day = now.getDate();
var hour = now.getHours();
var minute = now.getMinutes();
var second = now.getSeconds();
var nowdate = year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second;
$("#search_site_time_lt").val(nowdate);
//取得上周时间Date.parse(nowdate).
var lwDate = new Date();
var year1 = lwDate.getYear();
var month1 = lwDate.getMonth() + 1;
var day1 = lwDate.getDate()- 7;
var hour1 = lwDate.getHours();
var minute1 = lwDate.getMinutes();
var second1 = lwDate.getSeconds();
var lastWeekDate = year1 + "-" + month1 + "-" + day1 + " " + hour1 + ":" + minute1 + ":" + second1;
$("#search_site_time_gt").val(lastWeekDate);
});
</script>但是时间格式有问题，年份显示为111，要怎么改呢？

[BUG胡汉三]

不知道LZ是不是这个意思！！！

 上个星期：<input id="date2" name="date2" type="text" value="" /> <br/>
  当前时间：<input id="date1" name="date1" type="text" value="2011-05-18" />
  <script type="text/javascript">
  		var date1 = document.getElementById("date1").value;
		alert(date1);
		var yy = date1.substr(0,4);
		var mm = date1.substr(5,7).substr(0,2);
		var dd = date1.substr(8,10);
		var now = new Date(yy,mm,dd-7);
		document.getElementById("date2").value = now.getYear()+'-'+now.getMonth()+'-'+now.getDate();
	</script>