JS实现实时显示时间_知识百科

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在之前的项目中有做到需要在网页中实时显示当前时间，实现的效果如图所示：

1. html结构

2. js

/*实时显示时间*/ function showtime(){    var today,hour,second,minute,year,month,date;    var strDate ;    today=new Date();    var n_day = today.getDay();    switch (n_day){        case 0:{          strDate = "星期日"        }break;        case 1:{          strDate = "星期一"        }break;        case 2:{          strDate ="星期二"        }break;        case 3:{          strDate = "星期三"        }break;        case 4:{          strDate = "星期四"        }break;        case 5:{          strDate = "星期五"        }break;        case 6:{          strDate = "星期六"        }break;        case 7:{          strDate = "星期日"        }break;    }    year = today.getFullYear();    month = today.getMonth()+1;    date = today.getDate();    hour = today.getHours();    minute =today.getMinutes();    second = today.getSeconds();     if (month >= 1 && month <= 9) {        month = "0" + month;    }    if (date >= 0 && date <= 9) {        date = "0" + date;    }    if (hour >= 0 && hour <= 9) {        hour = "0" + hour;    }    if (minute >= 0 && minute <= 9) {        minute = "0" + minute;    }    if (second >= 0 && second <= 9) {        second = "0" + second;    }    document.getElementById('current-time').innerHTML ="当前时间："+ year + "年" + month + "月" + date + "日" +"  "+ strDate +"   " + hour + ":" + minute + ":" + second; //显示时间    setTimeout("showtime();", 1000); //设定函数自动执行时间为 1000 ms(1 s)}