var  timerId=0 ;

function clearTimer() {
  if (timerId!=0) {
    clearTimeout(timerId); timerId=0; }}

function startTimer() {
  clearTimer(); timerId=setTimeout('timerId=0;hideMenus();hideSubMenus()',700); }

function showMenu(menuNum)
{
    clearTimer(); hideMenus(); hideSubMenus();
      
    document.getElementById('menu_'+menuNum).style.display="";
}

function showSubMenu(menuNum)
{
    clearTimer(); hideSubMenus();
      
    document.getElementById('submenu_'+menuNum).style.display="";
}


function hideMenus()
{
    var  i=1 ;
    while (document.getElementById('menu_'+i))
    {
        document.getElementById('menu_'+i).style.display="none";
        i++;
    }
}

function hideSubMenus()
{
    var  i=1 ;
    while (document.getElementById('submenu_'+i))
    {
        document.getElementById('submenu_'+i).style.display="none";
        i++;
    }
}        
               
function hiLite(obj)
{
    clearTimer();
    obj.style.cursor = "hand";
    obj.className = obj.className.replace('unlite', 'hilite');
    
    hideSubMenus();
}

function hiLiteSub(obj)
{
    clearTimer();
    obj.style.cursor = "hand";
    obj.className = obj.className.replace('unlite', 'hilite');
}

function unLite(obj)
{
    startTimer();
    obj.className = obj.className.replace('hilite', 'unlite');
}


function goto(url)
{
    window.location=url;
}

function toggle_visibility(id)
{
    var e = document.getElementById(id);
    if(e.style.display == 'block')
    {
        e.style.display = 'none';
    }
    else
    {
        e.style.display = 'block';
    }
}