function getCurrentTime(){

 var enable=0; today=new Date();
 var day; var date; var helloz; var timez; var time; var str;
 
 if(today.getDay()==0)day="星期日";
 if(today.getDay()==1)day="星期一";
 if(today.getDay()==2)day="星期二";
 if(today.getDay()==3)day="星期三";
 if(today.getDay()==4)day="星期四";
 if(today.getDay()==5)day="星期五";
 if(today.getDay()==6)day="星期六";
 
 timez = today.getHours();
 if( timez > 6 && timez <11) helloz="早上好！";
 if( timez >= 11 && timez <13) helloz="中午好！";
 if( timez >= 13 && timez <18) helloz="下午好！";
 if( (timez >= 18 && timez <24)  || (timez >= 0 && timez <6) ) helloz="晚上好！";

 date=today.getYear()+"年"+(today.getMonth()+1)+"月"+today.getDate()+"日 ";
 time=today.getHours()+":"+today.getMinutes()+":"+today.getSeconds()+" ";

 //str = "今天是："+date+time+day;
 str =helloz+"今天是："+date+day;

 document.all["time_p"].innerHTML = str;

}

window.setInterval("getCurrentTime()",1000);