关于extras 参数传递问题，多个extras只能接收第一个传过来的参数，怎么回事?

var titles,username,content,time,replycount,agencyid;
for(var n in data){
titles=data[n].title;
username=data[n].nickname;
content=data[n].content;
time=data[n].posttime;
replycount=data[n].replycount;
agencyid=data[n].agencyid;
var li = document.createElement('li');
li.addEventListener('tap', function() {
//打开关于页面
mui.openWindow({
url: 'repeat.html',
id:'info',
extras:{
titles:titles,
content:content,
time:time,
username:username,
replycount:replycount,
agencyid:agencyid
}
});
});
li.className = 'mui-table-view-cell mui-media';
li.innerHTML=' <div class="mui-table" > <div class="mui-table-cell mui-col-xs-10" ';
li.innerHTML+='<h4 class="mui-ellipsis" style="text-align:center ">'+titles+'</h4> <h5>发帖人：'+username+'</h5>';
li.innerHTML+=' <p class="mui-h4 mui-ellipsis">'+content+'</p> </div>';
li.innerHTML+=' <div class="mui-table-cell mui-col-xs-2 mui-text-right"> <span class="mui-h5" style="margin-right:1cm ">评论数：'+replycount+'</span><span class="mui-h5">'+time+'</span></div></div>';
table.appendChild(li);

  //  alert("text:"+data[n].name+" value:"+data[n].age );    
  }