function initMenu(){
	var _nav = document.getElementById('nav');
	if (_nav){
		var _links = _nav.getElementsByTagName('a');

		var cookiesValue = getCookie("menuActive");
		if(cookiesValue != 'undefined' && cookiesValue != null && cookiesValue != -1) _links[cookiesValue].parentNode.className += " active";

		for(i=0; i< _links.length; i++) {
			_links[i].index = i;
			_links[i].onclick = function(){

				var today = new Date();
				var exp = new Date(today.getTime() + (365*24*60*60*1000));

				if (this.parentNode.className.indexOf('active') != -1) {
					setCookie("menuActive", -1, exp.toGMTString(), "/");
					this.parentNode.className = this.parentNode.className.replace('active','');
				} else {
					hideLevels(_links);
					this.parentNode.className += ' active';
					setCookie("menuActive", this.index, exp.toGMTString(), "/");
				}
			}
		}
	}
}
function hideLevels(_links){
	for(i=0; i< _links.length; i++) {
		if (_links[i].parentNode.className.indexOf('active') != -1) {
			_links[i].parentNode.className = _links[i].parentNode.className.replace('active','');
			return;
		}
	}
}
function getCookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ';', len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}

function setCookie( name, value, expires, path, domain, secure ) {
	var today = new Date();
	today.setTime( today.getTime() );
	if ( expires ) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	document.cookie = name+'='+escape( value ) +
		( ( expires ) ? ';expires='+expires_date.toGMTString() : '' ) + //expires.toGMTString()
		( ( path ) ? ';path=' + path : '' ) +
		( ( domain ) ? ';domain=' + domain : '' ) +
		( ( secure ) ? ';secure' : '' );
}

function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + '=' +
			( ( path ) ? ';path=' + path : '') +
			( ( domain ) ? ';domain=' + domain : '' ) +
			';expires=Thu, 01-Jan-1970 00:00:01 GMT';
}

if (window.addEventListener) window.addEventListener("load", initMenu, false);
else if (window.attachEvent) window.attachEvent("onload", initMenu);