// montre le menu
function montre(id) {
var d = document.getElementById(id);
	for (var i = 1; i<=9; i++) {
		if (document.getElementById('smenu'+i)) {document.getElementById('smenu'+i).style.display='none';}
	}
if (d) {d.style.display='block';}
}

// cache le menu
function cache(id) {
var d = document.getElementById(id);
	for (var i = 1; i<=9; i++) {
		if (document.getElementById('smenu'+i)) {document.getElementById('smenu'+i).style.display='none';}
	}
if (d) {d.style.display='none';}
}

function changeStyle(elemvisited)
{
    switch (elemvisited)
    {
      case '1' : document.getElementById('panel1').style.backgroundPosition = '0px -40px';
                  document.getElementById('panel2').style.backgroundPosition = '-50px 0px';
                  document.getElementById('panel3').style.backgroundPosition = '-145px 0px';
                      document.getElementById('bouton1').style.visibility = 'hidden';
                      document.getElementById('bouton2').style.visibility = 'visible';
                      document.getElementById('bouton3').style.visibility = 'visible';
                      break;
      case '2' : document.getElementById('panel1').style.backgroundPosition = '0px 0px';
                      document.getElementById('panel2').style.backgroundPosition = '-50px -40px';
                      document.getElementById('panel3').style.backgroundPosition = '-145px 0px';
                      document.getElementById('bouton1').style.visibility = 'visible';
                      document.getElementById('bouton2').style.visibility = 'hidden';
                      document.getElementById('bouton3').style.visibility = 'visible';
                      break;
      case '3' : document.getElementById('panel1').style.backgroundPosition = '0px 0px';
                      document.getElementById('panel2').style.backgroundPosition = '-50px 0px';
                      document.getElementById('panel3').style.backgroundPosition = '-145px -40px';                      
                      document.getElementById('bouton1').style.visibility = 'visible';
                      document.getElementById('bouton2').style.visibility = 'visible';
                      document.getElementById('bouton3').style.visibility = 'hidden';
                      break;
    }
}