function plan_entretien()
{
    document.getElementById('telephonie').style.display = 'none';
    document.getElementById('telephonie').style.visibility = 'hidden';
    document.getElementById('reusinage').style.display = 'none';
    document.getElementById('reusinage').style.visibility = 'hidden';
    document.getElementById('accessoire').style.display = 'none';
    document.getElementById('accessoire').style.visibility = 'hidden';
    document.getElementById('approvisionnement').style.display = 'none';
    document.getElementById('approvisionnement').style.visibility = 'hidden';
    document.getElementById('plan-entretien').style.display = 'block';
    document.getElementById('plan-entretien').style.visibility = 'visible';
}

function reusinage()
{
    document.getElementById('telephonie').style.display = 'none';
    document.getElementById('telephonie').style.visibility = 'hidden';
    document.getElementById('plan-entretien').style.display = 'none';
    document.getElementById('plan-entretien').style.visibility = 'hidden';
    document.getElementById('accessoire').style.display = 'none';
    document.getElementById('accessoire').style.visibility = 'hidden';
    document.getElementById('approvisionnement').style.display = 'none';
    document.getElementById('approvisionnement').style.visibility = 'hidden';
    document.getElementById('reusinage').style.display = 'block';
    document.getElementById('reusinage').style.visibility = 'visible';
    
}


function accessoire()
{
    document.getElementById('telephonie').style.display = 'none';
    document.getElementById('telephonie').style.visibility = 'hidden';
    document.getElementById('reusinage').style.display = 'none';
    document.getElementById('reusinage').style.visibility = 'hidden';
    document.getElementById('plan-entretien').style.display = 'none';
    document.getElementById('plan-entretien').style.visibility = 'hidden';
    document.getElementById('approvisionnement').style.display = 'none';
    document.getElementById('approvisionnement').style.visibility = 'hidden';
    document.getElementById('accessoire').style.display = 'block';
    document.getElementById('accessoire').style.visibility = 'visible';
}

function approvisionnement()
{
    document.getElementById('telephonie').style.display = 'none';
    document.getElementById('telephonie').style.visibility = 'hidden';
    document.getElementById('reusinage').style.display = 'none';
    document.getElementById('reusinage').style.visibility = 'hidden';
    document.getElementById('plan-entretien').style.display = 'none';
    document.getElementById('plan-entretien').style.visibility = 'hidden';
    document.getElementById('accessoire').style.display = 'none';
    document.getElementById('accessoire').style.visibility = 'hidden';
    document.getElementById('approvisionnement').style.display = 'block';
    document.getElementById('approvisionnement').style.visibility = 'visible';
}