function variables(){
    t = 1;
    change = 1;    
    empty1 = -1;
    empty2 = -1;
    empty3 = -1;
    empty4 = -1;
    empty5 = -1;
    empty6 = -1;
    empty7 = -1;
    empty8 = -1;
    empty9 = -1;
    return;
    whogoesnow = "Tour joueur 1"
}

function win(){
  if   (empty1==empty2 && empty2==empty3 && empty3==0 ||
empty4==empty5 && empty5==empty6 && empty6==0 ||    
        empty7==empty8 && empty8==empty9 && empty9==0 ||
        empty1==empty4 && empty4==empty7 && empty7==0 ||
        empty2==empty5 && empty5==empty8 && empty8==0 ||
        empty3==empty6 && empty6==empty9 && empty9==0 ||
        empty1==empty5 && empty5==empty9 && empty9==0 ||
        empty3==empty5 && empty5==empty7 && empty7==0 ){
        alert ("Joueur 1: VOUS GAGNEZ !!!");          
        history.go(0)  
  }
  if   (empty1==empty2 && empty2==empty3 && empty3==1 ||
empty4==empty5 && empty5==empty6 && empty6==1 ||    
        empty7==empty8 && empty8==empty9 && empty9==1 ||
        empty1==empty4 && empty4==empty7 && empty7==1 ||
        empty2==empty5 && empty5==empty8 && empty8==1 ||
        empty3==empty6 && empty6==empty9 && empty9==1 ||
        empty1==empty5 && empty5==empty9 && empty9==1 ||
        empty3==empty5 && empty5==empty7 && empty7==1 ){
        alert ("Joueur 2: VOUS GAGNEZ !!!");
	history.go(0)
  }
}

function turnchange(t){
  if (change == 1)  {
    if (t == 0){
        t = 1;
        whogoesnow = "Tour : Joueur " + 1
    }
    else {
        t = 0;
	whogoesnow = "Tour : Joueur " + 2
    }
    
  }
  else {
    t = t;
  }
  change = 1  
  return (t); 
}

function changing(clicked){
if (clicked == 1){            
   spot = empty1 ;}
if (clicked == 2){
   spot = empty2 ;}
if (clicked == 3){
   spot = empty3 ;}
if (clicked == 4){
   spot = empty4 ;}
if (clicked == 5){
   spot = empty5 ;}
if (clicked == 6){
   spot = empty6 ;}
if (clicked == 7){
   spot = empty7 ;}
if (clicked == 8){
   spot = empty8 ;}
if (clicked == 9){
   spot = empty9 ;}

if (spot == -1){
   if (t == 0){
      xo = "  O  " ;	       	          
      spot = 0             
   }
   else {
      xo = "  X  "  ;              
      spot = 1	     
   }                              
   if (clicked == 1){            
      empty1 = spot;}
   if (clicked == 2){
      empty2 = spot ;}
   if (clicked == 3){
      empty3 = spot ;}
   if (clicked == 4){
      empty4 = spot ;}
   if (clicked == 5){
      empty5 = spot ;}
   if (clicked == 6){
      empty6 = spot ;}
   if (clicked == 7){
      empty7 = spot ;}
   if (clicked == 8){
      empty8 = spot ;}
   if (clicked == 9){
      empty9 = spot ;}
} 
else {
   if (spot == 0){
       xo = "  O  ";}
   if (spot == 1){
       xo = "  X  ";}
   change = 0
}
return (xo) ;
}

function change_b1(form){	
    clicked = 1;    
    changing(clicked) ;     
    t = turnchange(t) ;  
    form.b1.value = xo; 
    form.whoseturn.value = whogoesnow        
    win(); 
   return;
}
function change_b2(form){	
    clicked = 2;
    changing(clicked) ;   
    form.b2.value = xo;    
    t = turnchange(t) ;
    form.whoseturn.value = whogoesnow      
    win();
    return;
}

function change_b3(form){	
    clicked = 3;
    changing(clicked) ;
    form.b3.value = xo;         
    t = turnchange(t) ;    
    form.whoseturn.value = whogoesnow 
    win();
    return;   
}

function change_b4(form){	
    clicked = 4;
    changing(clicked) ;
    form.b4.value = xo;    
    t = turnchange(t) ;    
    form.whoseturn.value = whogoesnow     
    win();
    return;
}

function change_b5(form){	
    clicked = 5;
    changing(clicked) ;
    form.b5.value = xo;    
    t = turnchange(t) ;
    form.whoseturn.value = whogoesnow     
    win();     
    return;
}

function change_b6(form){	
    clicked = 6;
    changing(clicked) ;
    form.b6.value = xo;    
    t = turnchange(t) ;
    form.whoseturn.value = whogoesnow     
    win();
    return;
}

function change_b7(form){	
    clicked = 7;
    changing(clicked) ;
    form.b7.value = xo;    
    t = turnchange(t) ; 
    form.whoseturn.value = whogoesnow    
    win();
    return;
}

function change_b8(form){	
    clicked = 8;
    changing(clicked) ;    
    form.b8.value = xo;    
    t = turnchange(t) ;
    form.whoseturn.value = whogoesnow 
    win();    
    return;
}

function change_b9(form){	
    clicked = 9;
    changing(clicked) ;
    form.b9.value = xo;    
    t = turnchange(t) ;
    form.whoseturn.value = whogoesnow  
    win();
    return;
}