var scriptHost = 'https://www.emirates.com';
    var apiPath = '/service/chat/widget';
    var wc_country = 'us';
    var wc_language = 'english';
    var wc_channel = 'ek';
  function loadChatScript() {
  if (typeof td !== 'undefined') {
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.src = scriptHost.concat(
      apiPath,
      '?country=', wc_country,
      '&language=', wc_language,
      '&channel=', wc_channel,
      '&cdata=', td);
    document.getElementsByTagName('body')[0].appendChild(script);
    loadChatScript.loaded = true;
  }
}

function openChatButton(data) {
  if (!loadChatScript.loaded) {
    loadChatScript();
  }
  if (loadChatScript.loaded) {
    var _interval; 
    var open = function() {
      if (window.__WEBCHAT__ && window.__WEBCHAT__.loading) {
        clearInterval(_interval);
        window.openChatButton(data);
      }
    }
    _interval = setInterval(open, 250);
    open();
  }
}

loadChatScript();