//Gestion du menu déroulant sous IE
function startList() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}

//Gestion des jpeg animés
couv = new Array;
couv[0] = 'zone_img1'
couv[1] = 'zone_img2'
couv[2] = 'zone_img3'
num = 2

function ChangeImage()
	{
if (num == -1) { num = (couv.length-1)}
	if(document.getElementById)
		{
        var btn= document.getElementById("zone");
        btn.className = couv[num];
		num = num-1 
}
setTimeout("ChangeImage()", 6000);
	}

// Execution des scripts au chargement de la page
//window.onload = ChangeImage; 
window.onload = function() {
ChangeImage();
startList();
}