today=new Date();
var hours = today.getHours();
var minutes = today.getMinutes();
var seconds = today.getSeconds();
var timeValue = ((hours >12) ? hours -12 :hours); 
timeValue += ((minutes < 10) ? ":0" : ":") + minutes;
timeValue += (hours >= 12) ? " 下午 " : " 上午 ";
function initArray(){
this.length=initArray.arguments.length
for(var i=0;i<this.length;i++)
this[i+1]=initArray.arguments[i]  }
var d=new initArray("<span>星期日</span>","<em>星期一</em>","<em>星期二</em>","<em>星期三</em>","<em>星期四</em>","<em>星期五</em>","<em>星期六</em>"); 
document.write(today.getFullYear(),"年",today.getMonth()+1,"月",today.getDate(),"日 ",d[today.getDay()+1]," ",timeValue);