function initMenu(){
    var _nav = document.getElementById("menu");
    var lis = new Array();
    if (_nav) {
        var nodes = _nav.getElementsByTagName("li");
        
        for (var i = 0; i < nodes.length; i++) {
            if(nodes[i].parentNode.id == "menu")
                lis.push(nodes[i]);
        }
        for (var i = 0; i < lis.length; i++) {
            lis[i].index = i;
            if(lis[i].className.indexOf('active')!= -1)
            {
                if(lis[i].index != 0)
                    lis[lis[i].index-1].className += " prev";
                if(lis[i].index != lis.length-1)
                    lis[lis[i].index+1].className += " next";
            }
            lis[i].onmouseover = function()
            {
                if (this.className.indexOf('hover') == -1) 
                    this.className += " hover";
                
                if(this.index != 0)
                    lis[this.index-1].className += " prev";
                if(this.index != lis.length-1)
                    lis[this.index+1].className += " next";
            }
            lis[i].onmouseout = function(){
                this.className = this.className.replace("hover", "");
                
                if(this.index != 0)
                    lis[this.index-1].className = lis[this.index-1].className.replace("prev", "");
                    
                if(this.index != lis.length-1)
                    lis[this.index+1].className = lis[this.index+1].className.replace("next", "");
            }
        }
    }
}
if (window.addEventListener)
    window.addEventListener("load", initMenu, false);
else if (window.attachEvent)
    window.attachEvent("onload", initMenu);