function affiche_module(id){
	document.getElementById("contenu_accueil").style.display='none';
	document.getElementById("contenu_presentation_"+id).style.display='block';
}
function cache_module(cpt){
	for(var i = 0; i < cpt ; i++){
		document.getElementById("contenu_presentation_"+i).style.display='none';
	}
}

function affiche_nfo_session(nb_session,tab_participant)
{
	index=document.getElementById("id_session").selectedIndex;
	if(index != 0)
    {
		for(var i = 1; i <= nb_session; i++){
			nfo_session = document.getElementById('nfo_session'+i);
			nfo_session.style.display='none';
		}
		
		nfo_session = document.getElementById('nfo_session'+index);
		nfo_session.style.display='block';
		
		
		//recup le nombre de participant via le tableau creer passé en argument et la valeur select value
		nb_inscrit=tab_participant[document.getElementById('id_session').options[document.getElementById('id_session').selectedIndex].value];
	     
        if (nb_inscrit<25)
		{
		  document.getElementById('btn_inscript').disabled = false;
		}
	}
	else
    {
        
		for(var i = 1; i <= nb_session; i++)
        {
			nfo_session = document.getElementById('nfo_session'+i);
			nfo_session.style.display='none';
		}
		document.getElementById('btn_inscript').disabled='disabled';
	}
	
}