var CURRENT_CARD = -1;
var LAST_CARD = -1;

function highlight_card(card)
{
 hide_submenu();
 changeCSSClass('mainmenu_'+card,'omenu_'+card);
 CURRENT_CARD = card;
}

function show_submenu(card)
{
 hide_submenu();
 CURRENT_CARD = card;
 changeCSSClass('mainmenu_'+card,'omenu_'+card);
 hideDOMElement(getDOMElement('navigation_menu'));
 showDOMElement(getDOMElement('secondarymenu_'+card));
}

function hide_submenu()
{
 if(CURRENT_CARD!=-1)
{ 
changeCSSClass('mainmenu_'+CURRENT_CARD,'omenu');
 showDOMElement(getDOMElement('navigation_menu'));
  hideDOMElement(getDOMElement('secondarymenu_'+CURRENT_CARD));
 }
CURRENT_CARD = -1;
}