var currentMenuId = '';
var pendedHideMenuId = '';
var timeoutId;

function checkHideMenu()
{hideMenu(pendedHideMenuId);
}

function hideMenu(menuId)
{if (menuId != '')
   {menuBackground = document.getElementById(menuId + 'menubackground');
    menu = document.getElementById(menuId + 'menu');
    menuBackground.style.visibility = 'hidden';
    menu.style.visibility = 'hidden';
    currentMenuId = '';
   }
}

function pendHideMenu(menuId)
{pendedHideMenuId = menuId;
// window.alert(menuId);
 timeoutId = window.setTimeout('checkHideMenu();', 500);
}

function showMenu(menuId)
{window.clearTimeout(timeoutId);
 pendedHideMenuId = '';
 if (menuId != currentMenuId)
   {hideMenu(currentMenuId);
    menuBackground = document.getElementById(menuId + 'menubackground');
    menu = document.getElementById(menuId + 'menu');
    menuBackground.style.height = (menu.offsetHeight - 12) + 'px';
    menuBackground.style.visibility = 'visible';
    menu.style.visibility = 'visible';
    currentMenuId = menuId;
   }
}