1、添加日期提示控件,并且定义其名称为varData
2、加入一个html项目,输入如下内容
<script>
var dtToday = new Date();
var dtYesterday = new Date( dtToday - 86400000 );
var strYesterday = [dtYesterday.getUTCFullYear(), dtYesterday.getMonth()+1, dtYesterday.getDate()].join("-");
var curDate;
var curDate = pickerControlvarDate.m_oForm.value;
pickerControlvarDate.setValue(strYesterday);
</script>
<body onload = init() >
86400000是一天的值,可根据具体时间修改