function buildsubmenus() 
{
  var menuids=["menu-nav"] //Enter id(s) of UL menus, separated by commas
  for (var i=0; i<menuids.length; i++) {
    var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul");
    for (var t=0; t<ultags.length; t++){
      ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle"
      ultags[t].parentNode.onmouseover=function() {
        this.getElementsByTagName("ul")[0].style.display="block"
      }
      ultags[t].parentNode.onmouseout=function(){
        this.getElementsByTagName("ul")[0].style.display="none"
      }
    }
  }
}
buildsubmenus();