function?ChangeTime(){		
????var?mydate=new?Date();?		
????var?myyear=mydate.getFullYear();		
????var?mymonth=mydate.getMonth()+1;		
????var?myday=mydate.getDate();		
????var?myhour=mydate.getHours();		
????var?myminute=mydate.getMinutes();		
????var?mysecond=mydate.getSeconds();		
????//document.write(myyear+"年"+mymonth+"月"+myday+"日"+myhour+"時"+myminute+"分"+mysecond+"秒");
????console.log(myyear+"年"+mymonth+"月"+myday+"日"+myhour+"時"+myminute+"分"+mysecond+"秒");	
}		
setInterval(ChangeTime,1000);

F12開發者工具里面看變化

請問你說的是這樣嗎？

while(1){

var mydate=new Date();?

var myyear=mydate.getFullYear();

var mymonth=mydate.getMonth()+1;

var myday=mydate.getDate();

var myhour=mydate.getHours();

var myminute=mydate.getMinutes();

var mysecond=mydate.getSeconds();

document.write(mydate);

document.write(myyear+"年"+mymonth+"月"+myday+"日"+myhour+"時"+myminute+"分"+mysecond+"秒");

}