function detectTapatalk() {
       if (document.cookie.indexOf("tapatalk_redirect=false") < 0) {
          if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))) {
             setTapatalkCookies();
          } else if(navigator.userAgent.match(/android/i)) {
             setTapatalkCookies();
             }
          } else if((navigator.userAgent.match(/Symbian/i)) || (navigator.userAgent.match(/Nokia/i))) {
             setTapatalkCookies();
             }
          }
       }
    }

function setTapatalkCookies() {
	var date = new Date();
	var days = 60;
	date.setTime(date.getTime()+(days*24*60*60*1000));
	var expires = "; expires="+ date.toGMTString();
	document.cookie = "tapatalk_redirect=false" + expires; 
}

detectTapatalk();