var now = new Date();                                                                                                     
            var year = now.getFullYear(); //得到年份
            var month = now.getMonth();//得到月份
            var date = now.getDate();//得到日期
            month = month + 1;
            if (month < 10) month = "0" + month;
            if (date < 10) date = "0" + date;
            var time = year + "-" + month + "-" + date;    //（格式化"yyyy-MM-dd"）     


//input 输入框初始化
<input type="date" id="data">

<script type="text/javascript">
        $(function () {
            data.value = time ;
        })
 </script>