var countArr = [1,2,3,4,5,6,3,4,3,3,7,8,9,32,1,11,2,3,3,3];

    var res = {};

    var maxnum=0;

    var max;

    function getRepeat(arr){

      for (var i = 0; i < arr.length; i++) {

          if(!res[arr[i]]){

              res[arr[i]] = 1;

          }else{

              res[arr[i]] ++;

          }

      };

      var keys = Object.keys(res);

      console.log(keys);

      for(var j=0;j<keys.length;j++){

          if(res[keys[j]] > maxnum){

              maxnum = res[keys[j]];

              max = keys[j];

          }

      }

      return maxnum + max

    }

    getRepeat(countArr);

    console.log('出现次数最多的是' + max + '次数为' + maxnum);