斗鱼刷弹幕定时

(function(){
  var i=0;  var t=null;
  var msgTarea=document.getElementsByClassName("ChatSend-txt ")[0];
  var btn=document.getElementsByClassName("ChatSend-button")[0];
      function mySend(msg){
        msgTarea.value= "主播可以加入异形系列吗？";
        btn.click();
        if(i++>3){
            window.clearInterval(t);
        }
      }
   t = setInterval(mySend,1000*10);  // 10s刷一次
}());