// addEventListener compatible IE
function myAddEventListener(eventName, func) {
   if (window.addEventListener) {
      window.addEventListener(eventName, func, false);
   } else if (document.addEventListener) {
      document.addEventListener(eventName, func, false);
   } else if (window.attachEvent) {
      window.attachEvent("on"+eventName, func);
   }
}

// Ajoute les event aux sous-menu
function setSubMenu() {
	if( document.getElementById('menu') ) {
		var mainMenu = document.getElementById('menu');
		// Boucle sur les LI du menu
		for(i=0; i<mainMenu.childNodes.length; i++) {
			var menuItem = mainMenu.childNodes[i];
			menuItem.onmouseover = function() { this.className = 'affichessmenu' };
			menuItem.onmouseout  = function() { this.className = '' };
		}
	}
}

myAddEventListener('load', setSubMenu);