  
         
         var pbtn = document.getElementsByClassName('p');
         goodbtn.onclick = function(){
             console.log(34)
             goodbtn.classList.add('sdd');
         }
         var page = document.getElementsByClassName('t');
         for(var i = 0;i<pbtn.length;i++){
             (function pp(i){
                pbtn[i].onclick = function(){
                    for(var j = 0;j<pbtn.length;j++){
                        page[j].classList.remove("active");
                    }
      