var week; 
if(new Date().getDay()==0)week="星期日" 
if(new Date().getDay()==1)week="星期一" 
if(new Date().getDay()==2)week="星期二" 
if(new Date().getDay()==3)week="星期三" 
if(new Date().getDay()==4)week="星期四" 
if(new Date().getDay()==5)week="星期五" 
if(new Date().getDay()==6)week="星期六" 
document.write(new Date().getFullYear()+"年"+(new Date().getMonth()+1)+"月"+new Date().getDate()+"日 "+week);