javascript 问题

	<s:iterator value="list_latest_course">
		<LI><A rel="bookmark" href="<s:url action="courseInfoAction"><s:param name="course_id" value="name" /></s:url>">
			<s:property value="name" />
		</A>  <s:property value="createdDate" />
	</s:iterator>

function getTimeDifference(t)
{
	var r;

	var t1 = GetTimeTest(t);

	var now = new Date();
	var now_str = now.toGMTString();
	var t2 = GetTimeTest(now_str);
	
	var d = t2 - t1;
	
	var MinMilli = 1000 * 60;   
	var HrMilli = MinMilli * 60;   
	var DyMilli = HrMilli * 24;
	   
	r = Math.round(Math.abs(d / MinMilli));
	if (r==0) return 1+"分钟前";
	if (r<60) return r+"分钟前";
	
	r = Math.round(Math.abs(d / HrMilli));
	if (r<24) return r+"小时前";
	
	r = Math.round(Math.abs(d / DyMilli));
	if (r==1) return r+"昨天";
	return r+"天前";

}