var newsID = '';
 function news(id){
  var newsObj = document.getElementById('a' + newsID);
  if(newsObj){
    newsObj.style.display = 'none';
    document.getElementById('b' + newsID).className = 'option2';
  }
  var obj = document.getElementById('a' + id);
  document.getElementById('b' + id).className = 'option1';
  obj.style.display = '';
  newsID = id;
 }
        
        var news1ID = '';
 function news1(id){
  var news1Obj = document.getElementById('c' + news1ID);
  if(news1Obj){
    news1Obj.style.display = 'none';
    document.getElementById('d' + news1ID).className = 'option2';
  }
  var obj = document.getElementById('c' + id);
  document.getElementById('d' + id).className = 'option1';
  obj.style.display = '';
  news1ID = id;
 }
 
 function djs1(){
var timedate= new Date("8/8/2008 20:00:00");
var times= "距北京奥运会开幕";
var now = new Date();
var date = timedate.getTime() - now.getTime();
var time = Math.floor(date / (1000 * 60 * 60 * 24));
if (time >= 0)
document.write( times+"还有:"+time+"天")
}