// JavaScript Document
activateMenu = function(nav) {
        /* currentStyle restricts the Javascript to IE only */
        if (document.all && document.getElementById(nav).currentStyle) {
                var navroot = document.getElementById(nav);
                /* Get all the list items within the menu */
                var lis=navroot.getElementsByTagName("LI");
                for (i=0; i<lis.length; i++) {
                        /* If the LI has another menu level */
                        if(lis[i].lastChild.tagName=="UL"){
                                /* assign the function to the LI */
                                lis[i].onmouseover=function() {
                                   /* display the inner menu */
                                   this.lastChild.style.display="block";
                                }
                                lis[i].onmouseout=function() {
                                        this.lastChild.style.display="none";
                                }
                        }
                }
        }
}

window.onload= function(){
   activateMenu('nav');
}