效果图

html

<span id="time"></span>

JS

// 实时显示当前时间
$(document).ready(function () {function showTime() {var today = new Date;var y = today.getFullYear();var M = today.getMonth() + 1;var d = today.getDate();var w = today.getDay();var h = today.getHours();var m = today.getMinutes();var s = today.getSeconds();var week = ['星期天', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'];$("#time").html(y + '年' + M + '月' + d + '日  ' + ' ' + h + ':' + m + ':' + s + '  ' + week[w]);}showTime();                     //先调用下，否则还需一秒后才呈现setInterval(showTime, 1000);    //每1秒(1000毫秒)后调用 showTime()
})