function affiche(obj){
	var id = obj.id;
	
	for(var i = 1; i <= 2; i++){
		document.getElementById('sousmenu'+i).style.display = "none";
	}
	
	if(document.getElementById('sous'+id)){
		document.getElementById('sous'+id).style.display = "block";
	}
}

function banniere()
{
numimage= Math.round(Math.random()*(nbimage-1)+1);

if (numimage >=0 && numimage <5)
{
gotosite = "";
url = "ImageAleatoire/Images/image1.jpg";
alte = "filtre";
}
if (numimage >=5 && numimage <10)
{
gotosite = "";
url = "ImageAleatoire/Images/image2.jpg";
alte = "fauteuils";
}
if (numimage >=10 && numimage <15)
{
gotosite = "";
url = "ImageAleatoire/Images/image3.jpg";
alte = "occultant";
}

if (numimage >=15 && numimage <20)
{
gotosite = "";
url = "ImageAleatoire/Images/image4.jpg";
alte = "dentiste";
}

if(gotosite != "")
	{
	document.write ('<a href="' + gotosite + '">');	
	}
document.write('<img src="' + url + '" alt="' + alte + '" border=0/>')
if(gotosite != "")
	{
	document.write('</A>')
	}
}