<meta charset="utf-8">
<script>
    var mydate = new Date();
    var year = mydate.getFullYear();
    var month = mydate.getMonth() + 1;
    var day = mydate.getDate();
    var myarr = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
    var week = myarr[mydate.getDay()];
    document.write(year + "年" + month + "月" + day + "日" +week);
</script>

//<script>标签没加，最好在html中输出