获取当前日期，时间，星期

html

当前时间: <span id="nowTime"></span> <span id="weekday"></span>

js

<script type="text/javascript">
    /**
     * 初始化函数
     */
    setDate();

    /**
     * 获取当前时间
     */
    var nowDate1 = "";
    function setDate() {
        var date = new Date();
        var year = date.getFullYear();
        nowDate1 = year + "-" + addZero((date.getMonth() + 1)) + "-" + addZero(date.getDate()) + "  ";
        nowDate1 += addZero(date.getHours()) + ":" + addZero(date.getMinutes()) + ":" + addZero(date.getSeconds());
        document.getElementById("nowTime").innerHTML = nowDate1;
        setTimeout('setDate()', 1000);
    }

    /**
     * 年月日是分秒为10以下的数字则添加0字符串
     * @param time
     * @returns {number | *}
     */
    function addZero(time) {
        var i = parseInt(time);
        if (i / 10 < 1) {
            i = "0" + i;
        }
        return i;
    }

    /**
     * 初始化星期几
     * @type {string}
     */
    var weekday = "星期" + "日一二三四五六".charAt(new Date().getDay());
    document.getElementById("weekday").innerHTML = weekday;
</script>