function setMenuDeroulant(navRoot){
   for (i=0; i<navRoot.childNodes.length; i++) {
   node = navRoot.childNodes[i];
   var j =0;
   while(( j <  node.childNodes.length) && (node.nodeName != "LI") ){
	node = node.chilNodes[j];
	j++;
   }
   if (node.nodeName=="LI" /*&& node.childNodes[1].nodeName=="UL"*/) {
    node.onmouseover = function() {
     this.className+="over";
    }
    node.onmouseout=function() {
     this.className=this.className.replace("over", "");
    }
   }
  }
}

function startMenuDeroulant() {
 if (document.getElementById && navigator.appVersion.indexOf('MSIE') != -1) {
      setMenuDeroulant(document.getElementById("nav_sport_et_loisir"));
	  setMenuDeroulant(document.getElementById("nav_industrie"));
 }
}