startMenu = function() {
        navRoot = document.getElementById("site-menu-dropdown");
        for (i=0; i<navRoot.childNodes.length; i++) {
                node = navRoot.childNodes[i];

                node.onmouseover = function() {
                        this.className += " over";
                }

                node.onmouseout = function() {
                        this.className = this.className.replace(" over", "");
                }
        }
}

if(document.all) window.onload = startMenu;