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function fireDTMCustomEvent(eventname){
    var _b = document.getElementsByTagName('body')[0];
    if(!!_b){
       if ('CustomEvent' in window) {
          var event = new CustomEvent(eventname);
       } else {
          var event = document.createEvent('CustomEvent');
          event.initCustomEvent(eventname, true, true, {});
       }

       _b.dispatchEvent(event);
    }
}