document.write(""); 
now = new Date() //定义新对象，new具有Date的性质                
date = now.getDate();                
month= now.getMonth() + 1 ;                
year= now.getYear();                
document.write(year);                
document.write("年"); 
document.write(month);                
document.write("月");                
document.write(date);                
document.write("日"); 
document.write(" ");                
if (now.getDay() == 5) document.write("星期五")                
if (now.getDay() == 6) document.write("星期六")                
if (now.getDay() == 0) document.write("星期日")                
if (now.getDay() == 1) document.write("星期一")                
if (now.getDay() == 2) document.write("星期二") 
if (now.getDay() == 3) document.write("星期三")  
if (now.getDay() == 4) document.write("星期四")    
document.write(" ");