var timerRunning = false;
var timerID;
var page_index;

window.onload = function() {
	var navLinks = document.getElementById( "nav" ).getElementsByTagName( "A" );
	for ( var i = 0 ; i<navLinks.length ; i++ ) {
		if ( navLinks[i].className == "niveau1_on" ) {
			page_index =  navLinks[i].id.replace( "menu", "");
			toggleMenu(page_index);
			break;
		}
	}
}

function stopTimer() {
    if ( timerRunning ) clearTimeout( timerID );
    timerRunning = false;
}

function overMenu(index) {
    stopTimer();
	toggleMenu(index);
	startTimer();
}

function toggleMenu(index) {
	var ssmenus = document.getElementById("secondary_nav").getElementsByTagName("DIV");
	for ( var i = 0 ; i < ssmenus.length ; i++ ) {
		if ( ssmenus[i].id == "ssmenu" + index ) {
			document.getElementById( ssmenus[i].id ).className = "ssmenu_on";
		} else {
			document.getElementById( ssmenus[i].id ).className = "ssmenu";
		}
	}
}

function startTimer() {
    stopTimer();
	timerID = setTimeout( "afficheMenuPage()", 1500 );
	timerRunning = true;
}

function afficheMenuPage() {
	timerRunning = false;
	toggleMenu(page_index);
}