js错误

1
<script language="javascript">

<%
  String []yearMonth=DateUtil.getTodayYearMonth4bit();

%>
var today_year=parseInt(<%=yearMonth[0]%>);
var today_month=parseInt(<%=yearMonth[1]%>);
   function check_expiry(em_y,em_m,prompt){
    alert(today_year);
     alert(today_month);
}

</srcipt>
  奇怪,这里取得today_year,today_month  提示未定义

2
<script language="javascript">

<%
  String []yearMonth=DateUtil.getTodayYearMonth4bit();

%>

   function check_expiry(em_y,em_m,prompt){
   var today_year=parseInt(<%=yearMonth[0]%>);
var today_month=parseInt(<%=yearMonth[1]%>);

    alert(today_year);
    alert(today_month);
}
</srcipt>
    这里取得today_year,today_month  直正确

我得搞清楚下为什么