效果图
<!DOCTYPE html><html> <head> <meta charset="{CHARSET}" /> <title>js获取以后工夫并实时刷新</title> <script> //页面加载调用 window.onload = function() { //每1秒刷新工夫 setInterval("NowTime()", 1000); }; function NowTime() { //获取年月日 var time = new Date(); var year = time.getFullYear(); var month = time.getMonth(); var day = time.getDate(); //获取时分秒 var h = time.getHours(); var m = time.getMinutes(); var s = time.getSeconds(); //查看是否小于10 h = check(h); m = check(m); s = check(s); document.getElementById("nowtime").innerHTML = "以后工夫：" + year + "年" + month + "月" + day + "日 " + h + ":" + m + ":" + s; } //工夫数字小于10，则在之前加个“0”补位。 function check(i) { //办法一，用三元运算符 var num; i < 10 ? (num = "0" + i) : (num = i); return num; //办法二，if语句判断 //if(i<10){ // i="0"+i; //} //return i; } </script> </head> <body> <div id="nowtime">在这里显示工夫</div> </body></html>