// JavaScript Document
var last_open = "";
var up_hover;
function activateMenu(nav) {
  var i = 0;
  navroot = document.getElementById(nav);
  var lis=navroot.getElementsByTagName("LI");
  for (i=0; i<lis.length; i++){  
    if(lis[i].lastChild.tagName=="UL" ){
      lis[i].onmouseover=function(){
          if (document.getElementById('ul_active')) document.getElementById('ul_active').style.display="none";
          if (last_open) last_open.style.display="none";              
          this.lastChild.style.display="block"; 
          last_open = this.lastChild;         
      }
      //lis[i].onmouseout=function() {
        //document.getElementById('ul_active').display="block"; 
        //this.lastChild.style.display="none"; 
      //}
    }    
  }
}

function start_menu(){

}