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(nav){
/* pass the function the id of the top level UL */
/* remove one, when only using one menu */
activatemenu('nav');
activatemenu('nav2');
}