document.write('<div style="position:absolute;width:4.2%;height:2%;top: 2.1%;left: 84.14%;border: 0 solid red;color:#71D7FF;font-size:0.08rem;">\n' +
    '    <span id="timeinfo"></span>\n' +
    '</div>\n' +
    '\n' +
    '<div style="position:absolute;width:6%;height:2%;top: 2.1%;left: 92%;border: 0 solid red;color:#71D7FF;font-size:0.08rem;">\n' +
    '    <span id="dateinfo"></span>\n' +
    '</div>\n')

/*alert($(window).height());
    var sonStyle = document.getElementsByClassName("son");
    sonStyle.style.height  = $(window).height()-500 + "px";*/
let rootWidth = document.documentElement.clientWidth || document.body.clientWidth;
let rootDom = document.querySelector('html');
rootDom.style.fontSize = rootWidth / 10 + 'px';
getnow();

function getnow() {

    //1、获得当前时间，格式化时间

    var now = new Date();

    var year = now.getFullYear();

    var month = now.getMonth() + 1;

    if (month < 10) {

        month = "0" + month;

    }

    var date = now.getDate();

    if (date < 10) {

        date = "0" + date;

    }

    var hour = now.getHours();

    if (hour < 10) {

        hour = "0" + hour;

    }

    var minute = now.getMinutes();

    if (minute < 10) {

        minute = "0" + minute;

    }

    var second = now.getSeconds();

    if (second < 10) {

        second = "0" + second;

    }

    var nowstr = year + "-" + month + "-" + date + " " + hour + ":" + minute + ":" + second;

    //alert(nowstr);
    //alert(nowstr);
    //2、显示时间 html
    //获得标签对象
    /*var nowspan=document.getElementById("nowspan");
    nowspan.innerHTML=nowstr;*/
    //2021-09-30 12:00:00
    $("#dateinfo").html(nowstr.slice(0, 10));
    $("#timeinfo").html(nowstr.slice(11, 19));
    //3、使时间动起来
    setTimeout("getnow()", 1000);
}