function showweek() // 显示中文星期 
{now = new Date() //定义新对象，new具有Date的性质   
if (now.getDay() == 1) return ("星期一")   
if (now.getDay() == 2) return ("星期二")   
if (now.getDay() == 3) return ("星期三")  
if (now.getDay() == 4) return ("星期四")  
if (now.getDay() == 5) return ("星期五")  
if (now.getDay() == 6) return ("星期六")   
if (now.getDay() == 0) return ("星期日")   
}   

function showdate() //显示系统日期   
{   
var now = new Date()   
var year = now.getYear()   
var month = now.getMonth()+1   
var day = now.getDate()   
return year+"年"+month+"月"+day+"日"   
}