function sommaire(){ 
document.getElementById('sommaire').style.display='block';
document.getElementById('table').style.display='none';
document.getElementById('materiel').style.display='none';
document.getElementById('telechargement').style.display='none';
document.getElementById('animation').style.display='none';
document.getElementById('diffusion').style.display='none';
document.getElementById('caracteristique').style.display='none';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('sommaire_menu').style.backgroundPosition='center';
document.getElementById('sommaire_menu').style.color='#000000';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('table_menu').style.color='#ffffff';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('materiel_menu').style.color='#ffffff';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('telechargement_menu').style.color='#ffffff';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('caracteristique_menu').style.color='#ffffff';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('animation_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('diffusion_menu').style.color='#ffffff';

}

function table(){
document.getElementById('sommaire').style.display='none';
document.getElementById('table').style.display='block';
document.getElementById('materiel').style.display='none';
document.getElementById('telechargement').style.display='none';
document.getElementById('animation').style.display='none';
document.getElementById('diffusion').style.display='none';
document.getElementById('caracteristique').style.display='none';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('sommaire_menu').style.color='#ffffff';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('table_menu').style.color='#000000';
document.getElementById('table_menu').style.backgroundPosition='center';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('materiel_menu').style.color='#ffffff';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('telechargement_menu').style.color='#ffffff';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('caracteristique_menu').style.color='#ffffff';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('animation_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('diffusion_menu').style.color='#ffffff';
}

function materiel(){
document.getElementById('sommaire').style.display='none';
document.getElementById('table').style.display='none';
document.getElementById('materiel').style.display='block';
document.getElementById('telechargement').style.display='none';
document.getElementById('animation').style.display='none';
document.getElementById('diffusion').style.display='none';
document.getElementById('caracteristique').style.display='none';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('sommaire_menu').style.color='#ffffff';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('table_menu').style.color='#ffffff';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('materiel_menu').style.backgroundPosition='center';
document.getElementById('materiel_menu').style.color='#000000';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('telechargement_menu').style.color='#ffffff';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('caracteristique_menu').style.color='#ffffff';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('animation_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('diffusion_menu').style.color='#ffffff';
}

function telechargement(){
document.getElementById('sommaire').style.display='none';
document.getElementById('table').style.display='none';
document.getElementById('materiel').style.display='none';
document.getElementById('telechargement').style.display='block';
document.getElementById('animation').style.display='none';
document.getElementById('diffusion').style.display='none';
document.getElementById('caracteristique').style.display='none';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('sommaire_menu').style.color='#ffffff';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('table_menu').style.color='#ffffff';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('materiel_menu').style.color='#ffffff';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('telechargement_menu').style.backgroundPosition='center';
document.getElementById('telechargement_menu').style.color='#000000';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('caracteristique_menu').style.color='#ffffff';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('animation_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('diffusion_menu').style.color='#ffffff';
}

function caracteristique(){
document.getElementById('sommaire').style.display='none';
document.getElementById('table').style.display='none';
document.getElementById('materiel').style.display='none';
document.getElementById('telechargement').style.display='none';
document.getElementById('caracteristique').style.display='block';
document.getElementById('animation').style.display='none';
document.getElementById('diffusion').style.display='none';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('sommaire_menu').style.color='#ffffff';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('table_menu').style.color='#ffffff';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('materiel_menu').style.color='#ffffff';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('telechargement_menu').style.color='#ffffff';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('caracteristique_menu').style.backgroundPosition='center';
document.getElementById('caracteristique_menu').style.color='#000000';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('animation_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('diffusion_menu').style.color='#ffffff';
}


function animation(){
document.getElementById('sommaire').style.display='none';
document.getElementById('table').style.display='none';
document.getElementById('materiel').style.display='none';
document.getElementById('telechargement').style.display='none';
document.getElementById('caracteristique').style.display='none';
document.getElementById('animation').style.display='block';
document.getElementById('diffusion').style.display='none';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('sommaire_menu').style.color='#ffffff';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('table_menu').style.color='#ffffff';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('materiel_menu').style.color='#ffffff';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('telechargement_menu').style.color='#ffffff';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('animation_menu').style.backgroundPosition='center';
document.getElementById('animation_menu').style.color='#000000';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('caracteristique_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('diffusion_menu').style.color='#ffffff';
}

function diffusion(){
document.getElementById('sommaire').style.display='none';
document.getElementById('table').style.display='none';
document.getElementById('materiel').style.display='none';
document.getElementById('telechargement').style.display='none';
document.getElementById('caracteristique').style.display='none';
document.getElementById('animation').style.display='none';
document.getElementById('diffusion').style.display='block';
document.getElementById('sommaire_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('sommaire_menu').style.color='#ffffff';
document.getElementById('table_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('table_menu').style.color='#ffffff';
document.getElementById('materiel_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('materiel_menu').style.color='#ffffff';
document.getElementById('telechargement_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('telechargement_menu').style.color='#ffffff';
document.getElementById('diffusion_menu').style.backgroundImage ='url("template/fleche.jpg")';
document.getElementById('diffusion_menu').style.backgroundPosition='center';
document.getElementById('diffusion_menu').style.color='#000000';
document.getElementById('caracteristique_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('caracteristique_menu').style.color='#ffffff';
document.getElementById('animation_menu').style.backgroundImage ='url("template/fleche_off.jpg")';
document.getElementById('animation_menu').style.color='#ffffff';
}