text: function getBaseUrl() {
      var ishttps = 'https:' == document.location.protocol ? true : false;
      var url = window.location.host;
      if (ishttps) {
          url = 'https://' + url;
      } else {
          url = 'http://' + url;
      }
      return url;
  }
  function getWsBaseUrl() {
      var ishttps = 'https:' == document.location.protocol ? true : false;
      var url = window.location.host;
      if (ishttps) {
          url = 'wss://' + url;
      } else {
          url = 'ws://' + url;
      }
      return url;
  }
  function notify(title, options, callback) {
      // 先检查浏览器是否支持
      if (!window.Notification) {
          return;
      }
      var notification;
      // 检查用户曾经是否同意接受通知
      if (Notification.permission === 'granted') {
          notification = new Notification(title, options); // 显示通知
  
      } else {
          var promise = Notification.requestPermission();
      }
  
      if (notification && callback) {
          notification.onclick = function(event) {
              callback(notification, event);
          }
          setTimeout(function () {
              notification.close();
          },3000);
      }
  }
  var titleTimer=0;
  var titleNum=0;
  var originTitle = document.title;
  function flashTitle() {
      if(titleTimer!=0){
          return;
      }
      titleTimer = setInterval(function(){
          titleNum++;
          if (titleNum == 3) {
              titleNum = 1;
          }
          if (titleNum == 1) {
              document.title = '【】' + originTitle;
          }
          if (titleNum == 2) {
              document.title = '【new message】' + originTitle;
          }
      }, 500);
  
  }
  function clearFlashTitle() {
      clearInterval(titleTimer);
      document.title = originTitle;
  }
  var faceTitles = ["[微笑]", "[嘻嘻]", "[哈哈]", "[可爱]", "[可怜]", "[挖鼻]", "[吃惊]", "[害羞]", "[挤眼]", "[闭嘴]", "[鄙视]", "[爱你]", "[泪]", "[偷笑]", "[亲亲]", "[生病]", "[太开心]", "[白眼]", "[右哼哼]", "[左哼哼]", "[嘘]", "[衰]", "[委屈]", "[吐]", "[哈欠]", "[抱抱]", "[怒]", "[疑问]", "[馋嘴]", "[拜拜]", "[思考]", "[汗]", "[困]", "[睡]", "[钱]", "[失望]", "[酷]", "[色]", "[哼]", "[鼓掌]", "[晕]", "[悲伤]", "[抓狂]", "[黑线]", "[阴险]", "[怒骂]", "[互粉]", "[心]", "[伤心]", "[猪头]", "[熊猫]", "[兔子]", "[ok]", "[耶]", "[good]", "[NO]", "[赞]", "[来]", "[弱]", "[草泥马]", "[神马]", "[囧]", "[浮云]", "[给力]", "[围观]", "[威武]", "[奥特曼]", "[礼物]", "[钟]", "[话筒]", "[蜡烛]", "[蛋糕]"];
  function placeFace() {
      var faces=[];
      for(var i=0;i<faceTitles.length;i++){
          faces[faceTitles[i]]="/static/images/face/"+i+".gif";
      }
      return faces;
  }
  function replaceContent (content,baseUrl) {// 转义聊天内容中的特殊字符
      if(typeof baseUrl=="undefined"){
          baseUrl="";
      }
      var faces=placeFace();
      var html = function (end) {
          return new RegExp('\\n*\\[' + (end || '') + '(pre|div|span|p|table|thead|th|tbody|tr|td|ul|li|ol|li|dl|dt|dd|h2|h3|h4|h5)([\\s\\S]*?)\\]\\n*', 'g');
      };
      content = (content || '').replace(/&(?!#?[a-zA-Z0-9]+;)/g, '&amp;')
          .replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/'/g, '&#39;').replace(/"/g, '&quot;') // XSS
          .replace(/face\[([^\s\[\]]+?)\]/g, function (face) {  // 转义表情
              var alt = face.replace(/^face/g, '');
              return '<img alt="' + alt + '" title="' + alt + '" src="'+baseUrl + faces[alt] + '">';
          })
          .replace(/img\[([^\s\[\]]+?)\]/g, function (face) {  // 转义图片
              var src = face.replace(/^img\[/g, '').replace(/\]/g, '');;
              return '<img onclick="bigPic(src,true)" src="' +baseUrl+ src + '" style="max-width: 100%"/></div>';
          })
          .replace(/file\[([^\s\[\]]+?)\]/g, function (face) {  // 转义图片
              var src = face.replace(/^file\[/g, '').replace(/\]/g, '');;
              return '<div class="folderBtn" onclick="window.open(\''+baseUrl+src+'\')"  style="font-size:25px;"/></div>';
          })
          .replace(/\[([^\s\[\]]+?)\]+link\[([^\s\[\]]+?)\]/g, function (face) {  // 转义超链接
              var text = face.replace(/link\[.*?\]/g, '').replace(/\[|\]/g, '');
              var src = face.replace(/^\[([^\s\[\]]+?)\]+link\[/g, '').replace(/\]/g, '');
              return '<a href="'+src+'" target="_blank" />【'+text+'】</a>';
          })
          .replace(/link\[([^\s\[\]]+?)\]/g, function (face) {  // 转义图片
              var src = face.replace(/^link\[/g, '').replace(/\]/g, '');;
              return '<a href="'+src+'" target="view_window"/>'+src+'</a>';
          })
          .replace(html(), '\<$1 $2\>').replace(html('/'), '\</$1\>') // 转移HTML代码
          .replace(/\n/g, '<br>') // 转义换行
  
      return content;
  }
  function bigPic(src,isVisitor){
      if (isVisitor) {
          window.open(src);
          return;
      }
  }
  function filter (obj){
      var imgType = ["image/jpeg","image/png","image/jpg","image/gif"];
      var filetypes = imgType;
      var isnext = false;
      for (var i = 0; i < filetypes.length; i++) {
          if (filetypes[i] == obj.type) {
              return true;
          }
      }
      return false;
  }
  function sleep(time) {
      var startTime = new Date().getTime() + parseInt(time, 10);
      while(new Date().getTime() < startTime) {}
  }
  function checkLang(){
      var langs=["cn","en"];
      var lang=getQuery("lang");
      if(lang!=""&&langs.indexOf(lang) > 0 ){
          return lang;
      }
      return "cn";
  }
  function getQuery(key) {
      var query = window.location.search.substring(1);
      var key_values = query.split("&");
      var params = {};
      key_values.map(function (key_val){
          var key_val_arr = key_val.split("=");
          params[key_val_arr[0]] = key_val_arr[1];
      });
      if(typeof params[key]!="undefined"){
          return params[key];
      }
      return "";
  }
  function utf8ToB64(str) {
      return window.btoa(unescape(encodeURIComponent(str)));
  }
  function b64ToUtf8(str) {
      return decodeURIComponent(escape(window.atob(str)));
  }
  ;
  