export function fireKeyEvent(el, evtType, keyCode) {
  var evtObj;
  if (document.createEvent) {
      if (window.KeyEvent) {//firefox 浏览器下模拟事件
          evtObj = document.createEvent('KeyEvents');
          evtObj.initKeyEvent(evtType, true, true, window, true, false, false, false, keyCode, 0);
      } else {//chrome 浏览器下模拟事件
          evtObj = document.createEvent('UIEvents');
          evtObj.initUIEvent(evtType, true, true, window, 1);
 
          delete evtObj.keyCode;
          if (typeof evtObj.keyCode === "undefined") {//为了模拟keycode
              Object.defineProperty(evtObj, "keyCode", { value: keyCode });                       
          } else {
              evtObj.key = String.fromCharCode(keyCode);
          }
 
          if (typeof evtObj.ctrlKey === 'undefined') {//为了模拟ctrl键
              Object.defineProperty(evtObj, "ctrlKey", { value: true });
          } else {
              evtObj.ctrlKey = true;
          }
      }
      el.dispatchEvent(evtObj);
 
  } else if (document.createEventObject) {//IE 浏览器下模拟事件
      evtObj = document.createEventObject();
      evtObj.keyCode = keyCode
      el.fireEvent('on' + evtType, evtObj);
  }
}


fireKeyEvent(document.getElementById('aa'),'keydown',40);



(function(){
  function mySend111(msg){
    fireKeyEvent(document.getElementsByClassName("chat-input border-box")[0],'keydown',32);}setInterval(mySend111,1000);
}());




(function(){
  var msgTarea=document.getElementsByClassName("chat-input border-box")[0];

  var btn=document.getElementsByClassName("bl-button live-skin-highlight-button-bg bl-button--primary bl-button--small")[0];

  
      function mySend(msg){
        
        msgTarea.value= "生而为嬴，就要刷新你的视界观";
        btn.click();
      }
   setInterval(mySend,2520);
}());