<html><!DOCTYPE html> <html> <head> <script language="javascript"> var t = null; t = setTimeout(time,1000);//开始执行 function time(){ clearTimeout(t);//清除定时器 dt = new Date(); var y=dt.getYear()+1900; var mm=dt.getMonth()+1; var d=dt.getDate(); var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]; var day=dt.getDay(); var h=dt.getHours(); var m=dt.getMinutes(); var s=dt.getSeconds(); if(h<10){h="0"+h;} if(m<10){m="0"+m;} if(s<10){s="0"+s;} document.getElementById("timeshow").innerHTML = y+"-"+mm+"-"+d+" "+weekday[day]+" "+h+":"+m+":"+s; t = setTimeout(time,1000); //设定定时器，循环执行 } </script> </head> <body> <div id='timeshow' style="color:red;font-size:40px;800px;height:200px;margin:0 auto" ></div> </body> </html>