function introduction(a,name) {
    var nbCouple = a;
    var coupleId = name;
	for(x=1; x<=nbCouple; x++){
	    coupleIdx = eval('coupleId')+x
	    if (x != 1) {
	        document.getElementById(coupleIdx).style.display = "none";
	    }
	}
}


function showVid(a, b, c, player1, player2, player3) {
//    var coupleId = a;
//    coupleIdx = eval('coupleId')+ b;
//    var nbCouple = c;
//    for(x=1; x<=nbCouple; x++){
//	    coupleIdHide = eval('coupleId')+x
//	    if (x != b) {
//	        
//	        document.getElementById(coupleIdHide).style.display = "none";
//	    }
//	}
//	document.getElementById(coupleIdx).style.display = "block"; 	

    if (b==1) {

         document.getElementById("containerCouple1").style.display = "block";
         document.getElementById("containerCouple2").style.display = "none";
         document.getElementById("containerCouple3").style.display = "none";
         if (player1!= null) player1.sendEvent('PLAY'); 
         if (player2!= null) player2.sendEvent('STOP');
         if (player3!= null) player3.sendEvent('STOP');

    }
    if (b==2) {

         document.getElementById("containerCouple2").style.display = "block"; 
         document.getElementById("containerCouple1").style.display = "none";
         document.getElementById("containerCouple3").style.display = "none";
         if (player2!= null) player.sendEvent('PLAY');
         //alert("ici");
         if (player1!= null) player1.sendEvent('STOP');
         //if (player3!= null) player3.sendEvent('STOP');
         //player2.sendEvent('PLAY');
        

    }    
    if (b==3) {
   

         document.getElementById("containerCouple3").style.display = "block"; 
         document.getElementById("containerCouple1").style.display = "none";
         document.getElementById("containerCouple2").style.display = "none";
         if (player3!= null) player3.sendEvent('PLAY');
         if (player1!= null) player1.sendEvent('STOP');
         if (player2!= null) player2.sendEvent('STOP');



    } 
    

}

function visibilite(classe){

  var lesDivs = document.getElementsByTagName("div");

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

  if (lesDivs.item(i).className == classe){

  if (lesDivs.item(i).style.display=="none") 

  lesDivs.item(i).style.display=""; 

  else 

  lesDivs.item(i).style.display="none"; 

   }

   }						

   }