Select any position then Switch Player in JavaScript -

i trying write function allows me select position on board switch players. had attempted write loop either nothing appeared or positions filled "x". believe need stop loop iterating once position selected , created loop addeventlister. (js newbie- thanks!)

function player1(){     for(var = 0; i<boardslots.length;i++) //iterate through positions     if(boardslots[i].classlist !== "x" || "o"){ //check see if space occupied          boardslots[i].classlist.add("x"); //add x          player2(); //switch player 2          } }  //player 2 selects o function player2(){     for(var = 0; i<boardslots.length;i++)     if(boardslots[1].classlist !== "x" || "o"){          boardslots[1].classlist.add("o");          player1();     }  }  boardslots[i].addeventlistener("click",player1); //select position on board  

var count = 0; function move1(){     if(count % 2 === 0 && !this.classlist.contains("x") && !this.classlist.contains("o")){          this.classlist.add("x");          count++;          // this.removeeventlistener('click', move1);      } else if(!count % 2 === 0) {         this.classlist.add("o");         count++;      } }  // add event listener each position boardslots[0].addeventlistener("click",move1);  boardslots[1].addeventlistener("click",move1);  boardslots[2].addeventlistener("click",move1);  boardslots[3].addeventlistener("click",move1);  boardslots[4].addeventlistener("click",move1);  boardslots[5].addeventlistener("click",move1);  boardslots[6].addeventlistener("click",move1);  boardslots[7].addeventlistener("click",move1);  boardslots[8].addeventlistener("click",move1);  boardslots[9].addeventlistener("click",move1);   };