function switchImage(imgName, imgSrc) 
{
	if (document.images)
	{
		if (imgSrc != "none")
		{
			if(document.images["accueil"]) document.images["accueil"].src = "images/accueil.gif";
			if(document.images["hotel"]) document.images["hotel"].src = "images/hotel.gif";
			if(document.images["resto"]) document.images["resto"].src = "images/resto.gif";
			if(document.images["region"]) document.images["region"].src = "images/region.gif";
			if(document.images["tarifs"]) document.images["tarifs"].src = "images/tarifs.gif";
			if(document.images["contact"]) document.images["contact"].src = "images/contact.gif";
			document.images[imgName].src = imgSrc;
		}
	}
}

function preloadImages() 
{
	bt1 = new Image;
	bt1.src = "images/accueil.gif";
	bt2 = new Image;
	bt2.src = "images/hotel_survol.gif";
	bt3 = new Image;
	bt3.src = "images/resto_survol.gif";
	bt4 = new Image;
	bt4.src = "images/region_survol.gif";
	bt5 = new Image;
	bt5.src = "images/tarifs_survol.gif";
	bt6 = new Image;
	bt6.src = "images/contact_survol.gif";
}