var current_partenaire = 1;
var last_partenaire;
function BackPartenaire() {
    document.getElementById("partenaire_"+current_partenaire).style.display="none";
    
    if (current_partenaire > 1)
        current_partenaire--;
    else
        current_partenaire = last_partenaire;
        
    document.getElementById("partenaire_"+current_partenaire).style.display="";
}

function NextPartenaire() {
    document.getElementById("partenaire_"+current_partenaire).style.display="none";
    
    if (current_partenaire < last_partenaire)
        current_partenaire++;
    else
        current_partenaire = 1;
    
    document.getElementById("partenaire_"+current_partenaire).style.display="";
}