function getNowTime(){ //取得当前时间 

var now= new Date(); 

var year=now.getYear(); 
var month=now.getMonth()+1; 
var day=now.getDate(); 

var sWeek = now.getDay();//星期 
var nowdate="今天是 "+year+"年"+month+"月"+day+"日 "+" 星期"+sWeek;

window.document.getElementById("tdDate").innerHTML=nowdate;

}