function init(){

    var turno = 1;
    var filas = [0,0,0];
    var columnas = [0,0,0];
    var diagonales = [0,0,0];



    jug1.onclick = function(){
        var nombre = prompt("Ingresa nombre");
        while(nombre == ""){
            nombre = prompt("Debe ingresa nombre");
        }
        jug1.textContent = nombre;
    }
    jug2.onclick = function(){
        var nombre = prompt("Ingresa nombre");
        while(nombre == ""){
            nombre = prompt("Debe ingresa nombre");
        }
        jug2.textContent = nombre;
    }
    xo1.onclick = function (){
        if(xo1.textContent !== 'X' && xo1.textContent !== 'O'){
            textContent = 'X';
        }
        if(xo1.textContent == 'X'){
            xo1.textContent = 'O';
        }else{
            xo1.textContent = 'X';
        }
    }
    xo2.onclick = function (){
        if(xo2.textContent !== 'X' && xo2.textContent !== 'O'){
            xo2.textContent = 'X';
        }
        if(xo2.textContent == 'X'){
            xo2.textContent = 'O';
        }else{
            xo2.textContent = 'X';
        }
    }
    comenzar.onclick = function(){
        var val = true;
        while(jug1.textContent == ""){
            alert("Jugador 1 debe ingresar un nombre");
            val = false;
            break;
        }
        while(jug2.textContent == ""){
            alert("Jugador 2 debe ingresar un nombre");
            val = false;
            break;
        }
        while(xo1.textContent !== 'X' && xo1.textContent !== 'O'){
            alert("Jugador 1 debe escoger X o O");
            val = false;
            break;
        }
        while(xo2.textContent !== 'X' && xo2.textContent !== 'O'){
            alert("Jugador 2 debe escoger X o O");
            val = false;
            break;
        }
        while(xo1.textContent == xo2.textContent ){
            alert("Jugador 2 debe escoger distinta opcion a jugador 1");
            val = false;
            break;
        }
        if(val == true){
            inicio();
        }
    }
    function inicio(){
        var i = 0;
            A1.onclick = function(){
                
                if(turno == 1){
                    A1.textContent = 'X'
                }else {
                    A1.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            A2.onclick = function(){
                if(turno == 1){
                    A2.textContent = 'X'
                }else {
                    A2.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            A3.onclick = function(){
                if(turno == 1){
                    A3.textContent = 'X'
                }else {
                    A3.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            B1.onclick = function(){
                if(turno == 1){
                    B1.textContent = 'X'
                }else {
                    B1.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            B2.onclick = function(){
                if(turno == 1){
                    B2.textContent = 'X'
                }else {
                    B2.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            B3.onclick = function(){
                if(turno == 1){
                    B3.textContent = 'X'
                }else {
                    B3.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            C1.onclick = function(){
                if(turno == 1){
                    C1.textContent = 'X'
                }else {
                    C1.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            C2.onclick = function(){
                if(turno == 1){
                    C2.textContent = 'X'
                }else {
                    C2.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            C3.onclick = function(){
                if(turno == 1){
                    C3.textContent = 'X'
                }else {
                    C3.textContent = 'O'
                }
                analizar();
                cambiarTurno();
                i++;
            }
            
            function cambiarTurno(){
                if(turno == 1){
                    turno = 0;
                }else{
                    turno = 1;
                }
            }
        alert("EMPATE");
    }

    function analizar(){

        if((A1.textContent == 'X') && (A2.textContent == 'X') && (A3.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((A1.textContent == 'O') && (A2.textContent == 'O') && (A3.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((B1.textContent == 'X') && (B2.textContent == 'X') && (B3.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((B1.textContent == 'O') && (B2.textContent == 'O') && (B3.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((C1.textContent == 'X') && (C2.textContent == 'X') && (C3.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((C1.textContent == 'O') && (C2.textContent == 'O') && (C3.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((A1.textContent == 'X') && (B1.textContent == 'X') && (C1.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((A1.textContent == 'O') && (B1.textContent == 'O') && (C1.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((A2.textContent == 'X') && (B2.textContent == 'X') && (C2.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((A2.textContent == 'O') && (B2.textContent == 'O') && (C2.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((A3.textContent == 'X') && (B3.textContent == 'X') && (C3.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((A3.textContent == 'O') && (B3.textContent == 'O') && (C3.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((A1.textContent == 'X') && (B2.textContent == 'X') && (C3.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((A1.textContent == 'O') && (B2.textContent == 'O') && (C3.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
        if((A3.textContent ==  'X') && (B2.textContent == 'X') && (C1.textContent == 'X')){
            alert("EL GANADOR ES: X");
        }else if((A3.textContent ==  'O') && (B2.textContent == 'O') && (C1.textContent == 'O')){
            alert("EL GANADOR ES: O");
        }
    }

    
    
}