<script type="text/javascript" src="js/My97DatePicker/WdatePicker.js"></script>
需要引用My97DatePicker包
<script type="text/javascript">
$(function() {
/*弹出框日期文本框默认值，设置样式*/
var date=new Date();
var Year=date.getYear();
var Month=date.getMonth();
var yDate=date.getDate();
var yesterday=new Date(Year,Month,yDate);
yesterday.setDate(yesterday.getDate()-1);
var MM=yesterday.getMonth();
MM++;
var Month=MM > 10?MM:("0"+MM)
var DD=yesterday.getDate();
var yDate=DD > 10?DD:("0"+DD)
//得到最终结果
yesterday = yesterday.getFullYear() + "-" + Month + "-" + yDate;
$(".Wdate").val(yesterday);
</script>
<div class="alert_div_02">
<a>总局下发开始日期：</a>
<input type="text" class="Wdate" />
</div>