获取系统当前时间 年月日

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<script type="text/javascript">

    //得到当前时间yyyy-MM-dd

    var myDate = new Date();

    var nowDate = myDate.getFullYear();

    nowDate = nowDate + ((myDate.getMonth() + 1) < 10 ? "-0" + (myDate.getMonth() + 1) : "-" + (myDate.getMonth() + 1));

    nowDate = nowDate + (myDate.getDate() < 10 ? "-0" + myDate.getDate() : "-" + myDate.getDate());

     alert(nowDate);

</script>